SaaS 1000 - Free exportable list of the fastest growing SaaS companies
Google Open Source - All of Googles open source projects under a single umbrella
Look at that SaaS - Inspiration and resources for SaaS founders
Open Source @IFTTT - A collection of IFTTT OSS projects.
Pocket SaaS GlideApp - Quarterly earnings+SaaS metrics of public cloud companies
Code NASA - 253 NASA open source software projects