MLDonkey is an open source, free software multi-network peer-to-peer application. MLDonkey requires "ocaml" to be builded, and also requires "lablgtk" if you want to enable its GUI. There's a SlackBuild at SlackBuilds.org for each one. By default, this SlackBuild is going to build MLdonkey without its GUI. If you want to enable MLDonkey's GUI, you'll have to enable it with the GUIOPT variable, which can have 'oldgui', 'newgui1' or 'newgui2' as values. For example, if you want to build mldonkey with "oldgui" then execute the build script as follows: GUIOPT=oldgui ./mldonkey.SlackBuild