Hey bro, good to see you pulling through the tough fight with the big C! This place is an awesome pool of information, for supplements check out the supplement forum, you'll most likely find the most amount of info there.

As for myself, the supplements that I regulary use are:

Whey Protein (year round)
Multi-Vitamin (year round)
Vitamin C (year round)
Glucosamine+Chondroitin (year round)
Creatine (around twice a year for 2-3 months at a time)