some nice FREE software:

http://launchy.net  —>launch programs with only a few keystrokes (Windows)

http://lightshot.skillbrains.com —>handy screen capture software  (Windows)

http://windirstat.info  —>directory statistics (Windows)

http://blender.org —>unbelievable 3D content development/rendering software (choose your platform)

http://inkscape.org —>scalable vector graphic software, can import resulting .svg files into blender for 3D fun  (choose your platform)