Why to prepare an address decoder for specific regions to switch between RAM and ROM? You can use 64kB SRAM chip for the whole space, kickstarted by ATMega. The way shows Ben Ryves.

AVR Studio 5 supports all AVR microcontrollers. Now you can bring all your 8– and 32-bit AVR projects into one, easy-to-use environment.

Gameduino shield is based on FPGA. Inner software CPU is running at 50MIPS. It can perform various graphics (backgrounds, sprites) and 32 channel sound effects.

Netduino is an open source electronics platform using the .NET Micro Framework. The board features a 32-bit microcontroller and a rich development environment, making it a perfect solution for engineers and hobbyists alike.

Acorn micro-kernel is a simple open source multitasking OS for 8 bit ATMega CPU, written in Assembler. It provides all the basic synchronization primitives.

This is a simple SD audio player biult with only an 8-pin microcontroller (ATTiny85).

With Arduino, you have a powerful IDE. Here is an alternative: A Visual Studio plugin.

Ftisp is a command-line utility that allows program AVR processors via an USB chip FT2232 or FT232R.
Ftisp uses the fast synchronous bit-bang features of this chips.

Three circuits with AVRs, implementing a simple BASIC interpreter.

I bet you know a lot of artickes on "How to connect 1-Wire device to AVR". Here is the problem reversed: How to simulate an 1-Wire device in AVR?

Photo: MyCorp