log-malloc2 is a malloc logging preload library that assists with discovering memory leaks. It features backtraces and byte-exact memory tracking.
LibDebug is a library that, on signal catch, will display a lot of useful debugging information depending on the environment variable DEBUG_.
A cross-browser library for plotting and interactive geometry.
A .NET solution for rendering barcode images in SQL Server 2000, 2005, and 2008 Reporting Services.