SaaS 1000 - Free exportable list of the fastest growing SaaS companies
Mattermark - Ranking 800,000+ high growth Internet companies
Look at that SaaS - Inspiration and resources for SaaS founders
pickSaaS - Hundreds of SaaS products, analyzed.
Bullet Train - The Ruby on Rails SaaS-in-a-Box.
Cardlife - Track all your business subscriptions with Cardlife.