overLIB and PluginsoverLIB has an extension interface that allows third parties to extend overLIB's functionality without major changes to overLIB. This allows overLIB to be small and flexible, yet have features required only by a few people.
Using pluginsUsing Plugins - A must read before using plugins.
Official Plugins - These are the plugins included in the official distribution.
Unofficial Plugins - More plugins the you can download separately.