Learn assembly language programming using the $25 Atmel AVR Butterfly. The only additional hardware you need is an RS-232 serial cable and connection (described in Appendix A). Windows.
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$19.95 - Link to description

 

This is an additional chapter for Programming Microcontrollers using Assembly Language (above) available as a free download.

Free - Link to download page

 

This brief glance or summary (aperçu) of Atmel AVR microcontrollers introduces the newbie to the world of AVRs. It uses the Atmel STK500 Starter Kit (an $80 development board) and the ImageCraft AVR C compiler (a demo version sufficient for this book may be downloaded for free).
Windows only.

No longer available