The One Laptop Per Child project has made a collection of free audio samples available for download:
This huge and continuously expanding collection of new and original samples have been donated to Dr. Richard Boulanger @ cSounds.com specifically to support the OLPC developers, students and XO users. They are free and will be available under a [...]

Blipdrums is a new web-based business specializing in unique electronic drum samples for musicians, sound designers and soundtrack creators.
“Blipdrums is dedicated to creating the best electronic percussion samples,” explains Bliphead and company founder Saul Stokes. Stokes creates Blipdrum’s sample using a mixture of software and hardware, combined with his own handmade analog modular music systems.
“We [...]