Warburton Technology - BASIC Stamp computers, PIC microcontrollers, PicBasic compilers, PIC programmers, motion control systems, modules, components, development tools, embedded technology design and development service. - http://www.warburtech.com/
AWC Electronics - Resources for basic stamp programming and accessories, tutorials, projects, with a basic stamp FAQ. - http://www.al-williams.com/resource.htm
OOPIC - How to use the OOPIC microcontroller. OOPic is an acronym for Object-Oriented Programmable Integrated Circuit. - http://www.oopic.com/
Peter Anderson - Embedded Processor Control - Embedded processor control using a PC parallel port, Parallax Basic Stamp BS2 and BS2SX and Microchip PICs. Inexpensive books, starter packages, data loggers, temperature measurement, weather measurement, A/D kits. - http://www.phanderson.com/
HVW Technologies Inc. - A distributor of BASIC Stamp, development tools and software. They also have a download section about PICs. - http://www.hvwtech.com/