There are a lot of extra tools and resources that can come in handy! We can't cover everything here and we're not going to reinvent the wheel by making only our own resources
Google - :D
Mechanical Design - A comprehensive lesson on mechanical design
JVN Mechanical Design Calculator
610 Mech Tutorial - A Comprehensive Guide to Mechanical
Introduction to mech by FRC 5256
How to Build Your Everything Really Fast - READ THIS
An IDIOT'S COMPLETE GUIDE TO FRC
Unofficial FRC Mechanism Encylopedia
FRC - General information on FRC
Chief Delphi - An FRC forum site
The Blue Alliance - An FRC Stat tracking site