Confluence is a collaboration software program.

Kaggle is an online community of data scientists and machine learners.

Online collaborative writing, citing, hosting of data and publishing.

Google's mission is to organize the world's information and make it universally accessible and useful.

DebateGraph offers a way to learn, deliberate and decide on complex issues.

PatientsLikeMe is a for profit patient network and real-time research platform

Open source software that facilitates open collaboration in science research.

Annotate the web, with anyone, anywhere.

Search Engine for Scientific Publications

The easy to use, online, collaborative LaTeX editor.