AVR simulator IDE
C/C++ function instrumentation (AOP, exception/stack tracing, GC)
The faster and smarter Debugger for Firefox DevTools
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
Change your MAC address for debugging
HTML/CSS/JS and Markdown Playground For Web Designers and Developers
Source-to-source debuggable derivatives in pure Python
Capturing screenshots, screen video, logcat, extract string ids
Portable Pokémon Mini Emulator
Tools for the payments type!
A low-power ISA design and simulator for a 2010 IEEE competition
a very fast full system simulator
Superseded by http://www.ti.com/tool/msp430-gcc-opensource