Carnegie Mellon Robot Navigation Toolkit
Carmen has been sponsored by DARPA's MARS Program.
Sick Optic where we get our LMS laser sensors.
Garmin builds GPS systems.
NASA's Cool Robot of the Week site
With the Palm Pilot Robot Kit, you can turn your Palm Pilot into a robot. Use that link to get information to buy parts, or you can buy a kit commercially from Acroname, Inc.. They have other robotic products as well.