The Gibberlings Three (http://www.gibberlings3.net/)

A new mod, Item Revisions aims to fix/tweak/enhance all items in Baldur's Gate II. Demivrgvs (http://forums.gibberlings3.net/index.php?showuser=1419) and Mike1072 (http://forums.gibberlings3.net/index.php?showuser=1412) have created a mod where weaker items have been improved, overpowered ones have been (or will be) nerfed, many descriptions have been extended or replaced with more appropriate ones, and so on. In addition, there are a number of rule changes available that can be chosen individually as the user wishes. This mod is available for Windows, OS X, and Linux installs.

Relevant links:

Download (http://www.gibberlings3.net/downloads/#item_rev)
Forum (http://forums.gibberlings3.net/index.php?showforum=157)
Project Page (http://www.gibberlings3.net/item_rev/index.php)
Readme (http://www.gibberlings3.net/readmes/readme-item_rev.html)