I assume that you look for plugins (that happen to be stored in the directory mod.

To find the list of plugins go to: community.elgg.org/mod/plugins/world.php . select the plugin that seems right, call it up and hit the button to download the file, unzip it and install it in the mod directory.

@ Convulsus, you can requst for new pluggins here, http://community.elgg.org/pg/groups/7/plugin-development/ . 

if you need a custom work for that module pm me at drsanupmoideen[at]gmail[dot]com

Regards, http://webgalli.com