NAMD :- Molecular simulation

NAMD is a parallel, object-oriented molecular dynamics code designed for high-performance simulation of large biomolecular system

NEWLEAD:- Design novel ligands based on pharmacophore

The NEWLEAD program: a new method for the design of candidate structures from pharmacophoric hypotheses.
J Med Chem. 1993 Nov 26;36(24):3863-70. Unique Identifier : AIDSLINE MED/94076288 Tschinke V; Cohen NC; Research Department, Pharmaceuticals Division, CIBA-GEIGY; Limited, Basel, Switzerland.
Abstract: We have developed a computer program, called NEWLEAD, for the automatic generation of candidate structures conforming to the requirements of a given pharmacophore. The treatment consists in connecting the pharmacophoric pieces with spacers assembled from small chemical entities (atoms, chains, or ring moieties). We have tested the program on several sets of input fragments, each comprising selected functional groups obtained from the bioactive conformations of reference molecules. In addition to the expected solutions, the program can generate new structures that are chemically unrelated to the reference molecules. This provides an unbiased starting point for the design of new generations of lead structures. The concept used in this approach is presented and discussed. The present possibilities of the program are illustrated by some examples. The treatment is very fast, because only a few bonds are created between building blocks already having ideal geometries. The ability to generate rapidly a variety of molecules conforming to a three-dimensional pharmacophoric model makes NEWLEAD a useful tool with wide applicability in rational drug design, including the areas of molecular mimicry and peptidomimetism

NIOSH Chemical Hazards:- iPhone implementation of the NIOSH Pocket Guide

The NIOSH Chemical Hazards application is an iPhone implementation of the NIOSH Pocket Guide to Chemical Safety. In addition to the complete contents of the pocket guide it includes the following enhanced functionality: - Searchable index of Chemical Names, Synonyms and Trade Names.

nMOLDYN:- interactive analysis program for Molecular Dynamics simulations

nMOLDYN is an interactive analysis program for Molecular Dynamics simulations. It is especially designed for the computation and decomposition of neutron scattering spectra, but also computes other quantities.

NMRNotebook :- NMR analysis

NMRtec have an NMRnotebook, is a new NMR software package for processing, analysing and managing NMR data. It is especially designed for chemists, biochemists and spectroscopists dealing with NMR. It allows you to perform state of the art 1D and 2D NMR data processing by just a few mouse clicks.

NMRPipe :-NMR analysis

NMRPipe provides comprehensive facilities for Fourier processing of spectra in one to four dimensions, as well as a variety of facilities for spectral display and analysis. It is currently used in over 300 academic and commercial laboratories.

NMRViewJ :-NMR analysis

NMRViewJ software for the visualisation and analysis of NMR data.

nuccyl :-PyMOL helper

nuccyl is a Perl program that allows PyMOL, a powerful open-source molecular modeling system, to display atomic models of nucleic acids in a highly simplified representation

Numerical Tools :-Binaries for a range of packages

Numerical tools binaries, source and installation instructions for Fortran, MPL, Octave, Cactus, Globus, TINKER and more

NWChem :- High performance comp chem

NWChem is a computational chemistry package that is designed to run on high-performance parallel supercomputers as well as conventional workstation clusters. It aims to be scalable both in its ability to treat large problems efficiently, and in its usage of available parallel computing resources. NWChem has been developed by the Molecular Sciences Software group of the Environmental Molecular Sciences Laboratory (EMSL) at the Pacific Northwest National Laboratory (PNNL).

O :- crystallographic modeling tool

O is a macromolecular crystallographic modeling tool. It can be used to build, modify and analyze macromolecular structures, there is also a unix beginners installation guide here

Olex2:- small-molecule structure solution and refinement

Olex2 is an easy-to-use program for small-molecule structure solution and refinement. It also includes many useful tools for structure analysis, archiving and report generation. All aspects of the structure determination and publication process are presented in a single, workflow-driven package – with the ultimate goal of producing an application which will be useful to both chemists and crystallographers

OMEGA :- Conformational analysis

Designed for use with the large libraries required for computer-aided drug design, OMEGA generates multi-conformer structure databases with unprecedented speed and reliability. Conformational expansion of drug-like molecules can be performed in fractions of a second, yielding a throughput of hundreds of thousands of compounds per processor per day. Scientists at AstraZeneca found OMEGA to be more reliable in reproducing crystal structures than programs taking orders of magnitude more time. Researchers at Vertex concluded, "Omega achieves the best balance between speed and performance among the programs examined, and it appears to be the most suitable tool for conformational analysis on large chemical databases."
There is a publication describing the validation

OnScreen DNA :- DNA visulisation

OnScreen DNA™ is geared towards, but not restricted to, high school and college students and teachers. The program has been designed, first of all, to allow students to become completely at home with the essential details of DNA's three-dimensional double helix structure.

Open3DQSAR:- High-throughput analysis of molecular interaction fields.

Open3DQSAR is an open-source tool aimed at pharmacophore exploration by high-throughput chemometric analysis of molecular interaction fields (MIFs). Open3DQSAR can generate steric potential, electron density and MM/QM electrostatic potential fields.

OpenBabel :- Chemoinformatics

OpenBabel is a community-driven scientific project including both cross-platform programs and a developer library designed to support molecular modeling, chemistry, and many related areas, including interconversion of file formats and data, Open Babel includes two components, a command-line utility and a C++ library. iBabel is a Mac OS X graphical user interface for OpenBabel

OpenDX :-Data analysis

OpenDX is a uniquely powerful, full-featured open source software package for the visualization of scientific, engineering and analytical data. Downloadable binaries are available from VIS Inc.

open enventory :- an integrated laboratory journal with a literature database and inventory program.

open enventory is an integrated laboratory journal with a literature database and inventory program. It is a web application (Internet Explorer 7, Firefox 3.5, Opera 9.52, Apple Safari, Google Chrome) and therefore platform independent (find technical information here). The integration makes physical data and safety informationen from the inventory automatically accessible in the laboratory journal. The automatic acquisition of freely accessible data from online databases makes manual data acquisition and catalogue searches obsolete. Accessing the online catalogues also allows price surveys with a mouseclick.

OpenMD:- Molecular Dynamics

OpenMD is an open source molecular dynamics engine which is capable of efficiently simulating liquids, proteins, nanoparticles, interfaces, and other complex systems using atom types with orientational degrees of freedom (e.g. “sticky” atoms, point dipoles, and coarse-grained assemblies). Proteins, zeolites, lipids, transition metals (bulk, flat interfaces, and nanoparticles) have all been simulated using force fields included with the code. OpenMD works on parallel computers using the Message Passing Interface (MPI), and comes with a number of analysis and utility programs that are easy to use and modify.

OpenMM:- MM Library

OpenMM is a library which provides tools for modern molecular modeling simulation. As a library it can be hooked into any code, allowing that code to do molecular modeling with minimal extra coding. Moreover, OpenMM has a strong emphasis on hardware acceleration, thus providing not just a consistent API, but much greater performance than what one could get from just about any other code available.

- PyOpenMM ( A Python-based software package built on the OpenMM library that allows computational chemists to perform accelerated molecular dynamics simulations on GPUs

- Amber/Sander interface for OpenMM ( These extensions to the Amber software allow Amber users to use OpenMM to run accelerated MD simulations using existing (Sander) input files.

M. S. Friedrichs, P. Eastman, V. Vaidyanathan, M. Houston, S. LeGrand, A. L. Beberg, D. L. Ensign, C. M. Bruns, V. S. Pande. “Accelerating Molecular Dynamic Simulation on Graphics Processing Units.” J. Comp. Chem., (2009), 30(6):864-872, available at:

OpenMM Zephyr :- Molecular Simulations

OpenMM Zephyr is a molecular simulation application for studying molecular dynamics of proteins, RNA, and other molecules. Zephyr guides the user through a work flow for setting up and running a specialized version of the molecular dynamics application gromacs. This version of gromacs uses the OpenMM API for GPU-accelerated molecular simulations. Graphical user interface for running OpenMM version of Gromacs. To use Zephyr's visualization capabilities, you will also need to install VMD (optional but recommended).

- PyOpenMM
( A Python-based software package built on the OpenMM library that allows computational chemists to perform accelerated molecular dynamics simulations on GPUs

- Amber/Sander interface for OpenMM ( These extensions to the Amber software allow Amber users to use OpenMM to run accelerated MD simulations using existing (Sander) input files.

M. S. Friedrichs, P. Eastman, V. Vaidyanathan, M. Houston, S. LeGrand, A. L. Beberg, D. L. Ensign, C. M. Bruns, V. S. Pande. “Accelerating Molecular Dynamic Simulation on Graphics Processing Units.” J. Comp. Chem., (2009), 30(6):864-872 (2009)

OrbDraw:-Molecular viewer

Orbdraw is a visualization program for displaying molecular orbital and electron density data from Gaussian, Gamess, Jaguar, Hondo, Mopac or Ampac calculations. Orbdraw can display the molecular orbitals, electron densities or spin densities in 3D as either wire frames or solid surfaces and can map orbitals or charges onto the density surfaces. The images can be rotated about any axis. The user may select which orbital to display, the resolution, the threshold value and the type of display. The orbitals are displayed over the molecular structure and the structure can be displayed as either a stick figure or with tubular bonds. The graphics images can be saved in several different graphics formats, and input files for PovRay ( can be generated.

ORCA:- General purpose tool for quantum chemistry

ORCA is a flexible, efficient and easy-to-use general purpose tool for quantum chemistry with specific emphasis on spectroscopic properties of open-shell molecules. It features a wide variety of standard quantum chemical methods ranging from semiempirical methods to DFT to single- and multireference correlated ab initio methods. It can also treat environmental and relativistic effects. Due to the user-friendly style, ORCA is considered to be a helpful tool not only for computational chemists, but also for chemists, physicists and biologists that are interested in developing the full information content of their experimental data with help of calculations.

Organic Chemistry Express:- iPhone Organic Chemistry Reference

Organic Chemistry Express is an iPhone Organic Chemistry Reference.

OSRA:- Optical Structure Recognition

OSRA is a utility designed to convert graphical representations of chemical structures, as they appear in journal articles, patent documents, textbooks, trade magazines etc., into SMILES (Simplified Molecular Input Line Entry Specification - see or SD file - a computer recognizable molecular structure format. OSRA can read a document in any of the over 90 graphical formats parseable by ImageMagick.

PaDEL-Descriptor: Calculate molecular descriptors

PaDel-Descriptor is software to calculate molecular descriptors and fingerprints. The software currently calculates 797 descriptors (663 1D, 2D descriptors and 134 3D descriptors) and 10 types of fingerprints. The descriptors and fingerprints are calculated using The Chemistry Development Kit with some additional descriptors and fingerprints. These additions include atom type electrotopological state descriptors, McGowan volume, molecular linear free energy relation descriptors, ring counts, count of chemical substructures identified by Laggner, and binary fingerprints and count of chemical substructures identified by Klekota and Roth.padel

Partek :- Data analysis

Partek A leading provider of pattern recognition software, data mining and interactive visualisation tools plan to support Mac OSX.

PC GAMESS/Firefly :- Computational Chemistry package

As of February 23, 2009, the PC GAMESSFirefly team is proud to announce the availability of the first official release of the PC GAMESS/Firefly package for Mac OS X/Intel platform.

List of some key features:

Free and fast! Proven reliability and performance of Windows/Linux PC GAMESS/Firefly.
Feature rich - supports all the functionality of Windows/Linux-based PC GAMESS/Firefly.
Runs on Mac OS X 10.4.x (Tiger) and 10.5.x (Leopard).
Parallel jobs run on SMP/multi-core hardware without additional software.
Installation is straightforward with a native DMG installer. New drag and drop job submission applications make running jobs significantly easier and more intuitive than most other ab-initio computational chemistry programs on the Mac platform. Just drag and drop your input file on to the appropriate run application for the number of CPU cores desired (or double-click and select) and your job will simply launch and open the output in a suitable text editor. All the necessary output files that may be needed for future follow-up jobs are automatically delivered to the input file directory. Everything is intended to be Mac friendly including a set of Mac-specific step by step Quick Start and Complete install and usage guides that should cover 90%+ of all potential questions for new users.
A batch job submission application and a STOP-FIREFLY-JOBS application which allows multiple job management.
A good set of third-party Mac native graphical applications is available to prepare input jobs as well as to visualize the output of those runs (e.g., WebMO). Most visualization tools that are not available natively for Mac work fine through Darwine or Crossover Wine.
There is an active community of Mac beta testers and Firefly community users to answer questions for new users.

PCModel :-Molecular modelling

PCModel 9 is available for MacOSX, it is designed for research chemists build, minimise and manipulate multiple structures. A variety of forcefields are supported, conformational searching is biult in and there is an interface to Gaussian and Games. They also supply Orbdraw for displaying molecular orbitals and Vibrate for visualise normal vibrational modes.

pDynamo:-an open source program library that has been designed for the simulation of molecular systems using quantum chemical (QC), molecular mechanical (MM) and hybrid QC/MM potential energy functions.

pDynamo is an open source program library that has been designed for the simulation of molecular systems using quantum chemical (QC), molecular mechanical (MM) and hybrid QC/MM potential energy functions. pDynamo is written in a mixture of Python and C and complements the existing version of Dynamo, now denoted fDynamo, that is written in Fortrans 90 and 95.
The current release version of pDynamo has the following capabilities:
• A density functional theory QC method employing Gaussian basis sets.
• Semi-empirical QC methods of the MNDO type, including AM1, MNDO, PDDG, PM3 and RM1.
• Support for some standard MM force fields, including AMBER, CHARMM and OPLS-AA.
• Hybrid QC/MM methods using any combination of the QC and MM potentials implemented in the library.
• Coupling to third-party QC programs.
• Energy calculations.
• Geometry optimizations.
• Transition state searches.
• Reaction path calculations.
• Normal mode analyses.
• Property calculations, such as charges and dipoles.
• Molecular dynamics simulations.
• Monte Carlo simulations.
• Various "soft" geometrical constraints.
• The ability to handle various common molecular file formats.
• Miscellaneous analysis tools.

Peacock :- Mass spec tool

Peacock is an application that can be used to interpret gas-chromatography/mass-spectrometry (GC/MS) data files.

Here is a quick overview of what you can do with Peacock.
  • Read NetCDF GC/MS files
  • Identify peaks in chromatograms
  • Identify compounds associated with peaks
  • Make a summary of all your analyses

Periodic Table

Periodic Table A user configurable Periodic Table.

Periodic Table

This interactive Periodic Table (application/applet) has been designed as a learning tool to help the beginning high school or undergraduate chemistry student gain insight.

PerlMol :- Chemoinformatics

PerlMol is a collection of Perl modules for chemoinformatics and computational chemistry with the philosophy that "simple things should be simple". It should be possible to write one-liners that use this toolkit to do meaningful "molecular munging". The PerlMol toolkit provides objects and methods for representing molecules, atoms, and bonds in Perl; doing substructure matching; and reading and writing files in various formats.

PFAAT :-Sequence alignment

Protein Family Alignment Annotation Tool (PFAAT) Pfaat is a Java-based protein sequence alignment application designed to facilitate the analysis, curation, and annotation of large protein sequence families has recently been updated

Polyxmass :- Mass Spec analysis

Polyxmass is a collection of programs that integrate into a mass spectrometry data simulation/analysis framework. The molecular objects that are dealt with are polymers. Because the user can define brand new polymers, the program is not targetted at any specific polymer in particular. Indeed, after having defined the basic protein or saccharide chemistry, the user can start using the polyxmass programs on proteinaceous or saccharidic polymer sequences

Pooch :- Cluster computing on Mac

It is of course worth bearing in mind how easy it is to set up small Mac clusters, Dauger Research provides a 3 step recipe for setting up a cluster using Pooch.

PovChem:- Molecule Viewer

PovChem is a chemical visualization and illustration program with a new graphic interface. It takes molecules in the PDB format, lets you to set up a picture with fine control over details of the illustration - colors, atom and bond radii, view orientation, etc. It will even calculate and display hydrogen bonds. It then exports the picture in POV-Ray format, which allows you to render the image with a state-of-the-art raytracer, giving high-quality images at any resolution, for anything from web page thumbnails to full-size high-resolution images for journal covers, advertisements, posters, anything!

PMV :-Molecule viewer

PMV A Python based Molecular Viewer

proFit :-Data analysis

pro Fit An excellent data analysis and graphing package has been update to version 6.0.6

Protein Dynamics :- Molecular simulations

Protein Dynamics The program simulates the dynamic behavior of proteins, DNA, and RNA, using the AMBER force field. It allows the user to view molecules, create and modify molecules, and run energy minimization and dynamics simulations

PSI3:- Quantum Chemistry

The PSI3 suite of quantum chemical programs is designed for efficient, high-accuracy calculations of properties of small to medium-sized molecules. The package's current capabilities include a variety of Hartree-Fock, coupled cluster, complete-active-space self-consistent-field, and multi-reference configuration interaction models. Molecular point-group symmetry is utilized throughout to maximize efficiency. The latest version of the code, PSI 3.4, rests upon a completely rewritten infrastructure relative to previous versions of the package. Non-standard computations are possible using a customizable input format. Package highlights include:
  • Arbitrarily high angular momentum levels in integrals and derivative integrals. (Up to m-type functions have been tested.)
  • Coupled cluster methods including CC2, CCSD, CCSD(T), and CC3 with RHF, ROHF, UHF, and Brueckner orbitals.
  • Determinant-based CI including CASSCF, RAS-CI, and Full CI.
  • Multithreaded integral-direct SCF, MP2, and MP2-R12.
  • Excited state methods: CIS, CIS(D), RPA, EOM-CCSD, and CC3.
  • Analytic energy gradients for CCSD with RHF, ROHF, and UHF orbitals.
  • Coupled cluster linear response methods for static and dynamic polarizabilities and optical rotation.
  • Diagonal Born-Oppenheimer correction (DBOC) for RHF, ROHF, UHF, and CI wave functions.

PSILO :- Macomolecular Database

PSILO is a database system that provides an easily accessible, consolidated repository for proprietary and non-proprietary macromolecular and protein-ligand structural information. It offers research organizations a means to systematically register, annotate, track and disseminate both experimental and computational macromolecular structural data. PSILO provides powerful bioinformatics and cheminformatics search, analysis and visualization capabilities through a web browser interface. For more information on PSILO please visit the web site at: 

PubChem Sketcher:- Drawing tool for PubChem Queries

A recent publication in Journal of Cheminformatics 2009, 1:20 doi:10.1186/1758-2946-1-20 describes a chemical structure sketching tool based exclusively on CGI server processing, client-side JavaScript functions, and image sequence streaming. The PubChem structure editor does not require the presence of any specific runtime support libraries or browser configurations on the client. It is completely platform-independent and verified to work on all major Web browsers, including older ones without support for Web2.0 JavaScript objects.

PyMOL :-Molecule viewer

PyMOL A 3D molecule viewer, PyMOL is a powerful molecular graphics package for structural biology and other sciences. This interactive system is fully scriptable using the Python computing language, sponsored and supported by users.
If you would like to enable the use of plugins in PyMol read this tutorial