Free desktop tools that aren't OpenOffice
Most everyone who's had some experience with free open source software has learned about the OpenOffice.org suite of productivity programs: a word processor, spreadsheet, presentation, database, and drawing tool that provide a good deal of the functionality of their commercial counterparts. For users who need powerful productivity tools but don't require a high degree of compatibility with Microsoft-formatted files, OpenOffice.org is almost a no-brainer.