linux syscall tracer
Source-to-source debuggable derivatives in pure Python
memory scanner for Linux
grieferCode
A new, open source, extensible, platform-agnostic tool
OllyDbg plugin: advanced labels
Allows executing code on MIPS32 EmbeddedLinux devices (WLAN routers)
An interpreter for the Lua language, written entirely in C#
C / C++ everything-memory debugger
Web debugging proxy based on Chrome DevTools network panel
A free IDE for C#, VB.NET, & Boo projects on Microsoft's .NET platform
An experimental BASIC language for Linux, Mac OS X, and Windows.
c/c++ debug-mutex library
Port of MS _CrtDbg Memory Leak Detection for WinCE