wikiHow - wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual.
Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.
Blurtit - Blurtit is a Q&A website. You can ask a question or answer on any question.
WIP.co - Work in progress. We are a community of makers who help each other ship product.
AllAnswered - Your Team's Collective Brain All-In-One Knowledge Management System Wiki + Q&A + Workflow + AI
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.