I use the best, I use the rest
Core tools which industrialize XSS discovery, propagation and exploitation.
Only a few tools, but definitely the best of the best !
Mutation, evasion, worm propagation tools available online.
A useful and accessible collection of tools to help you improve your payloads, as long as you understand what you are doing...
A fine selection of great XSS companion tools : Payloads generators, proxies, botnets ...
A lot of quite advanced stuff to move one step further. If you dare !
Reading the doc and/or the code is highly recommanded before you do anything with these "things".