www.blender.org Blender A 3-D computer animation program that supports modeling, animation, rendering and playback.
www.shatters.net/celestia Celestia This is a simulation program that allows students and teachers to navigate a 3-D solar system.
http://live.gnome.org/Dia Dia This site has a drawing program that is similar to Microsoft's venerable Visio, but geared to more informal diagrams and figures.
http://freemind.soureceforge.net FreeMind This software allows teaches and students to brainstorm with diagrams that can represent words, ideas and tasks.
www.gimp.org GIMP GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.
www.inkscape.org Inkscape Inkscape is an Open Source vector graphics editor, with capabilities similar to Illustrator, Freehand, CorelDraw, or Xara X using the W3Cstandard Scalable Vector Graphics (SVG) file format. Inkscape's main goal is to create a powerful and convenient drawing tool fully compliant with XML, SVG, and CSS.
www.moodle.org Moodle This is a popular course organization tool/virtual learning environment. Moodle is a course management system - a free, Open Source software package designed using sound pedagogical principles, to help educators create effective online learning communities. You can download and use it on any computer you have handy yet it can scale from a single-teacher site to a 50,000-student University.
www.scribus.net Scribus 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.
www.tuxpaint.org Tux Paint Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6 in the US, key stages 1 & 2 in the UK). It combines an easy-to-use interface, fun sound effects, and an encouraging cartoon mascot who guides children as they use the program.