Desktop Applications
OpenSolaris
http://www.opensolaris.org
The OpenSolaris project is an open source community and a place for collaboration and conversation around OpenSolaris technology.
UNIX and Open Source for Mac OS X
http://www.apple.com/downloads/macosx/unix_open_source
A collection of open source applications built specifically on the Mac OS X foundation
Tux Paint
http://www.tuxpaint.org
Tux Paint is a free drawing program designed for young children (kids ages 3 and up). It has a simple, easy-to-use interface, fun sound effects, and an encouraging cartoon mascot who helps guide children as they use the program.
Scribus - desktop publishing
http://www.scribus.net
Scribus is an open-source program that brings award-winning professional page layout to Linux/Unix, MacOS X, OS/2 and Windows desktops with a combination of "press-ready" output and new approaches to page layout.
PDFCreator
http://sourceforge.net/projects/pdfcreator
PDFCreator easily creates PDFs from any Windows program. Use it like a printer in Word, StarCalc or any other Windows application.
SchoolForge.net
http://www.schoolforge.net
SchoolForge's mission is to unify independent organizations that advocate, use, and develop open resources for education. We advocate the use of open texts and lessons, open curricula, free software and open source in education.
OpenOffice.org
http://www.openoffice.org
OpenOffice.org is an open source multi-platform and multilingual office suite. It includes a word processor, spreadsheet, multimedia presentation tool, drawing program and database. It can run on Microsoft Windows, Macintosh OS, GNU/Linux, Solaris.
Num Sum
http://numsum.com
Num Sum brings you online, simple, sharable web spreadsheets. In other words, you can now create social spreadsheets. All you need to join in is a modern web browser.
The OpenDisc
http://theopendisc.com
TheOpenDisc is a collection of high quality free and open source software. The programs run in Windows and cover the most common tasks such as word processing, presentations, e-mail, web browsing, web design, and image manipulation.
NeoOffice
http://www.neooffice.org
Macintosh OS X specific version of the OpenOffice suite of common productivity tools.