Pretty much everything for SH has had someone create it, until there is a new feature. Here are some quick examples:
Main SH Spreasheet - Richard (now maintained by Azbandar)
Fusion Calculator - Akerson (now maintained by internet, if the original was someone else I do apologize, but that's the first name I saw on it)
The Break Chance Calculator - Bob the Builder (now maintained by Pantless, again, I may have the wrong originator)
Super Team Builder - Akerson (now maintained by Azbandar)
Team Survivability Sheet - kaisies (unsure if this is still maintained)
Mastery Sheets - there are so many, that I couldn't begin to determine the original one, however Orblit has the best version currently available in a web app version.
Do some research (you are a student, it's what you should be doing anyways)! Most of it can be found in the Strategy & Guides section of the forums, what you can't find there is in the General Discussion section.