If you regularly have to manually edit files containing data in delimited text format then this application maybe of interest.

DB-Text is a general purpose tool for editing delimited text files. It can automatically recognise the used format analysing the content inside. It can accept data with mixed use of quotas and provides tools to copy in CSV (comma separated),TSV (tab separated) or HTML format of selected rows in the clipboard, with a simple click.

I've added it to the Data Analysis Tools page