Here you can find free software, some are written by "The Foundation".
You can download the source-code for different applications such as PIC microcontroller and stand alone applications.
You can also download pcb-layouts and electrical designs.

• Bitmap Converter
  
• PIC OSD
  
• PIC Timer
  
• Kitt Scanner
  
• H-bridge
  

How to choose the correct transformator?
Transformator Selector