Programming
All VS Express Editions (2005) and VC++ Express Edition 2008
MinGW/MSYS
Modelling
Blender
Wings3d
Gmax
qME
q2modeller
Anim8or
Image Editing
Wally
GIMP
fimg
IcoFX if that counts.
FilterForge Standalone (trial)
Sound
Wavosaur
Audacity
Misc
BSP
Notepad++