Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.
Listr - Listr lets you explore some of the best lists on Twitter, curated across your favorite categories.
Geneva - An all-in-one communication app for groups & communities
Refined Twitter - A browser extension that improves the Twitter experience
Community Fund - An early-stage accelerator to help communities grow from 0-1
Vicariously.io - Create Twitter lists based on the follows of other users