Nawvel - Nawvel is a handy-dandy library of tried, tested & curated resources.
pickSaaS - Hundreds of SaaS products, analyzed.
Google Design Sprint Starter Kit - This Kit helps you to run your first Google Design Sprint.
Look at that SaaS - Inspiration and resources for SaaS founders
Design Files - Professional resources for digital designers
Inside SaaS Sales - 1000+ sales emails and voicemails from top SaaS companies