AntTweakBar is a small and easy-to-use C/C++ library that allows programmers to quickly add a light and intuitive GUI into OpenGL or DirectX based graphic programs to interactively tweak them. Program variables can be linked to a graphical control that allows users to modify them. Programmers are not required to design the graphical interface by providing coordinates or by using a visual UI editor. Controls are automatically organized following an optional given hierarchy.
EDM is a fork of Sauerbraten (http://www.sauerbraten.org/) which is in development but playable. It features several multiplayer game modes like Deathmatch and Instagib, dynamic map model physics, enhanced particle effects, unique weapons and powerups, and more. Maps can be edited with other players online.
Intlize allows the developer to use catgets without its normally bulky syntax and without having to mind the details of correct indices. Catgets is the built-in internationalization suite of C compilers. Alternatively, Intlize can produce a compact file format optimized for fast access. Intermediate files are in gettext po format, so there are many comfortable tools available to do the translations. Runtime files are provided for C and C++ and for both catgets and intlize native support.
Nickel is a library for hierarchical maps and .ini files. It can be used to easily read, manipulate, and write configuration data in .ini format, among other things. It's also handy wherever a map structure (or tree of maps) is called for. Nickel focuses on speed, robustness, and portability.