This is my Twilight Imperium Second Edition (TI2) Calculator. It's a self contained web page that can track planet ownership and other important states in a TI2 game. It can then report income, number of votes, technology costs, voting order, and individual order for all players. The calculator is entirely written in Javascript, once loaded you won't need further internet access. The script does require a reasonably recent and standards compliant browser. It has been tested on Firefox and Safari.
Feel free to save a copy on your computer (but check back occasionally for updates). Be sure to save the "complete" web page, or else the icons for races and technologies won't appear (but the script will work fine).
The current version is 1.0, released September 17, 2005. Launch it now.