Here is a link to some utilities and the like over at Sorcerer's Place
http://www.sorcerers.net/Games/IWD/index_editors.php
These include:
Character Scripts
A Script Compiler
Premade Characters
Portraits (BG 1, 2 and Planescape Torment)
Auril's Bane Mod
a 3E rules conversion
a Tweak Pack
and the Ease of Use Pack
Also under TeamBG Tools there is a file that removes the experience cap.