The new version of Variable Checker has been released. It supports the possibility to open Planescape: Torment and Icewind Dale I save games.
There is the new feature 'Compare save games' that allows you to examine the differences in variables and their values from two save games.

Variable Checker forum thread: http://forums.blackwyrmlair.net/index.php?showtopic=688

Variable Checker home page: http://www.blackwyrmlair.net/Tools/varchecker.php