A DevTools proxy for iOS devices
C/C++ function instrumentation (AOP, exception/stack tracing, GC)
Homebrew toolchains for wii, gamecube, 3ds, ds, gba, gp32 and psp
linux syscall tracer
OllyDbg plugin: advanced labels
A real Win32 extensible passive debugger
MSP430 USB-Debug-Interface MSP-FET430UIF Firmware Information
Advanced Debugging Techniques in WinDbg