drbadnick/Libigot
Liberate Spigot (Libigot for short) is a fork of md_5's Spigot which is a fork of Afforess's CraftBukkit++ which is a CraftBukkit fork that has enhanced features and optimizations. Libigot's goal is to take all the greatness that Spigot has and give it compatibility with older plugins that haven't updated to support Bukkit's new version system with their namespace, among other features and tweaks that have been made by the Libigot Team.