SaaS 1000 - Free exportable list of the fastest growing SaaS companies
Mattermark - Ranking 800,000+ high growth Internet companies
Bullet Train - The Ruby on Rails SaaS-in-a-Box.
Look at that SaaS - Inspiration and resources for SaaS founders
Close - A CRM with built-in calling, SMS, and email
Ultimate SaaS Guide - 100 Q&A asked around scaling, sales and raising capital.