Brick By Brick - A free guide to building awesome communities
Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
The On Deck Fellowship - An 8-week program for 100 of the best early-stage founders
Geneva - An all-in-one communication app for groups & communities
Telescope - Telescope is an open-source app that lets you easily set up your own online community.
Figma Community - Publish live design files for others to learn from & remix.