Take The Bait - A blog about building your MVP & finding your first customer
Maker Swipe File - 100+ high-performing Tweets to help you grow your audience
Launch Library - Hundreds of resources on how to launch literally anything
Narrow - Narrow helps you build a targeted audience and increase your influence on twitter.
Lean Canvas - Business plans take too long to write, are seldom updated, and almost never read by others but documenting your hypotheses is key. Lean Canvas solves this problem using a 1-page business model.
Tweetflick - Save, organize & find Tweets to get the most out of Twitter