| [CMake](http://www.cmake.org) | CMake, the cross-platform, open-source build system. CMake is a family of tools designed to build, test and package software. |
| Doxygen | |
| [fontsproto](http://www.freedesktop.org/wiki/Software/xlibs) | X11 font extension wire protocol |
| glog | |
| GObject-Introspection | |
| gperf | |
| [guile](http://www.gnu.org/software/guile) | Guile is the GNU Ubiquitous Intelligent Language for Extensions, the official extension language for the GNU operating system. |