Pic Software - here's a tiny collection of some highly optimized pic code.
Theory mostly pertaining to pic code. If the pic code gave you a headache, this will give you a migraine.
gpsim - The gnupic simulator, a simulator for Microchip PIC microcontrollers.
gpasm - The gnupic assembler, an assembler for Microchip PIC microcontrollers.
GNUPIC Project has several Linux tools for PIC development.
Here's a copy of my resume.