Gamess-US on a Raspbery Pi
GAMESS is a program for ab initio molecular quantum chemistry. Briefly, GAMESS can compute SCF wavefunctions ranging from RHF, ROHF, UHF, GVB, and MCSCF. In an interesting development it is now possible to compile Gamess-US on the $40 Raspberry Pi, full instructions are available here. This provides a low cost system for demonstrating quantum chemistry.
To aid construction of the chemistry input WebMO-14.0, a web-based interface for computational chemistry programs, now has an App for iPhone/iPad. This allows you to compose e.g. a Gamess computation on your iPad or iPhone and send it to your Raspberry Pi (in the local network or on the web with a forwarded IP) to run the job and get the results back for visualizing and printing.