Snapzu - Snapzu is basically reddit alternative.

Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.

4chan - 4chan is a simple image-based bulletin board where anyone can post comments and share images.

WIP.co - Work in progress. We are a community of makers who help each other ship product.

Digg - Digg delivers the most interesting and talked-about stories on the Web right now.

Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.