Demolistic

Demolistic is a list-building community. Create, edit, share, and discuss ranked lists. If you disagree about the rankings on a list, you can create your own version of...

Free Web

Fluther

Question and answer service based on user profiles and a user score. Questions can be answered via the web page or via IM integration.

Free Web

Eris Solver

Free crowdsolver for complex problems. Using the problem tree analysis and an interdisciplinary approach.

Free Web

Kn-X

Kn-X is an anonymous question and answer site where answerers lose money if they are wrong.

Commercial Web

Polar Polls

Instant Opinions & Engagement Polar polls dramatically increase contributors, time spent, and more on Web sites and mobile apps.

Freemium Web

YAM

YAM (You Ask Me) is a video Q&A app where you get paid to ask and answer questions in short videos. Get answers from interesting people in video format or answer...

Freemium iPhone iPad