The slow descent into madness
The Open On-Chip Debugger
Machine Language Monitor for Commodore VIC-20
an object-oriented language with late binding
.NET debugger and assembly editor
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
A low-power ISA design and simulator for a 2010 IEEE competition
a very fast full system simulator
Basic and Easy to use CSharp IDE with compiler.
A real Win32 extensible passive debugger