The Visual Component Framework is an advanced C++ application framework that makes it easy to produce powerful Windows applications in C++. The framework is a based on a thoroughly modern C++ design and has built in support for Rapid Application Development (RAD). The framework is designed to be portable over multiple platforms and compilers, so you don't have to lose all that work that went into writing your app for a single platform!
The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Java, Ada, and Go, as well as libraries for these languages (libstdc++, libgcj,...). GCC was originally written as the compiler for the GNU operating system. The GNU system was developed to be 100% free software, free in the sense that it respects the user's freedom.
Source code documentation generator tool.
Doxygen is a documentation system for C++, C, Java, Objective-C, Python, IDL (Corba and Microsoft flavors), Fortran, VHDL, PHP, C#, and to some extent D.
"Exiv2 is a C++ library and a command line utility to manage image metadata. It provides fast and easy read and write access to the Exif, IPTC and XMP metadata of images in various formats. Exiv2 is available as free software and with a commercial license, and is used in many projects."
"This is a C++ wrapper for the Sqlite database C application programming interface. The code works for linux/unix, as well as win32. This library supports version 3 of the sqlite database. From version 1.2 the connection pool can be made threadsafe. "
"Qt is a cross-platform application and UI framework that allows developers to write applications once and deploy them across many desktop and embedded operating systems without rewriting the source code. "