(see: www.gnu.org for more information on GPL). 
 

Linux Programming Links

Lm_sensors
Just like Mother Board Monitor, but for LINUX.

Simple Directmedia Layer 
Programming Tool (Like DirectX for Windows).

SFont 
Great programming tool to display custom fonts.
 

Windows Programming Links

Inno Setup
Best damn FREEWARE Setup / Installer software. 

CpuIdle
The Swiss Army Knife Of Overclocking. 

Mother Board Monitor 5.0
A great program to monitor your motherboard.

ZLURP!
Best damn free ripper for creating compressed music.