Allthink!

Stack Exchange is a fast-growing network of 84 [and counting] question and answer sites on diverse topics from software programming to cooking to photography and gaming. We are an expert knowledge exchange: a place where physics researchers can ask each other about quantum entanglement, computer programmers can ask about JavaScript date formats, and photographers can share knowledge about taking great pictures in the snow.

Quora.com is a question/answer service allowing users to pose questions that other users can answer, each question and answer can have comments, each users can write one individual answer and there can be a summary answer.Each user can choose a description explaining their area of expertise or questions and answers can be anonymous.Questions and answers are searchable.

Hacker News is a social news website that caters to programmers and entrepreneurs, delivering content related to computer science and entrepreneurship.

News for nerds, stuff that matters. Slashdot (aka /.) is a technology-related news and discussion site with a focus on Linux, free and open source software and information freedom and privacy issues. The software it runs on, called Slashcode, is open source.

4chan is a simple image-based bulletin board where anyone can post comments and share images. There are boards dedicated to a variety of topics, from Japanese animation and culture to videogames, music, and photography. Users do not need to register an account before participating in the community. Feel free to click on a board that interests you and jump right in!

Startups get your queries answered by the World's Top Investors and Entrepreneurs. Startups + Investors +Entrepreneurs Connect.

AnyChan is a simple image-based bulletin board where anyone can post comments and share images. There are boards dedicated to a variety of topics, from Japanese animation and culture to videogames, music, technology and photography. Users do not need to register an account before participating in the community. Feel free to click on a board below that interests you and jump right in!

Topick is a single platform where passionate communities discuss the topics that matter to them. Topick offers a simple and welcoming experience:

TopTopic is an online community where members earn revenue from their posts, comments and moderation activities. Rather than run ads, we use member up-voting (no down-voting) to both raise the exposure of content, and drive revenue to the creators.

ZapChain is a collection of communities where you can earn Bitcoin for posting great content and joining discussions.

Old Pluto started as a pet project that I created for fun. I'm a software developer and a news junkie, so originally, I wanted to build a simple RSS aggregator for helping me find interesting news. As I used the website, I kept adding features anytime I needed something, and eventually with change after change, Old Pluto evolved into something more.