I use excel for most things but my efforts PALE in comparison to this fine file:
http://www.travellerrpg.com/CotI/Discuss/showthread.php?t=34361
Nervous Dick put this together for his Drinax campaign so it defaults to Trojan/Spin/Corr/Reft sectors but can be easily adapted.
I've hacked it for the Gateway Domain (Milieu 990) and some Rebellion era stuff. It is without a doubt the very most-awesomest-greatest excel tool ever.
Essentially, it imports J1-2-6 maps for the selected world along with all UWP values and descriptors. It then has an entry tab that allows you to put Library Data, Hooks, Patrons and other things into the entries for each world. It draws data directly from TravellerMap.com for images and linking.
Specifically for the Drinax campaign, it allows you to track Attitude scores across the factions and for the specific ports. I've managed to hack that for a Glimmerdrift setting fairly easily.
The creator is also very, very kind in providing assistance! We exchanged a number of emails as he walked me through my excel fumbling. Self-taught, I am, so not very skilled at it. If I can figure it out, anyone can.
I am so glad that you are finding it useful! And I am more than happy to help people with it or try to implement any changes/features anyone might have.