libcircle is an API for distributing embarrassingly parallel workloads using self-stabilization.
libgtextutils are a prerequisite to installing fastx
libpng is a library of functions for reading and writing .png files (portable network graphics).
Libxml2 is the XML C parser and toolkit developed for the Gnome project (but usable outside of the Gnome platform), it is free software available under the MIT License.
LibYAML is a YAML 1.1 parser and emitter written in C.
Lua is a powerful, fast, lightweight, embeddable scripting language.
LZO is a real time data compression library.
Mercurial is a version control system for managing source code trees.