Freescale's 'Embedded Learning Center'
Freescale courses on i.MX, PowerPC, and ColdFire and other Freescale architectures.
The navigation of the site is very difficult, but if you poke around you can locate these 'free' tutorials, papers, and Webinars on important Freescale topics.
Also includes tutorials on DSP, Zigbee, and RF.
Tags: 68hcxx, coldfire, dsp chips, power architecture, rf, zigbee