Collegial encyclopedia project set up to enhance accountability in the free encyclopedia field.

Written by and for those with conservative views and for home schoolers. Founded in November of 2006.

Political encyclopedia written from a leftist, progressive, liberal, and Democratic point of view.

Online collection of information, ideas, notes and humor that also accommodates user inputs or submissions.

Peer-edited encyclopedia dedicated to Star Trek topics and interests.

Searchable collection of tunes and musical themes that can be openly edited.

Volunteer-run and open content encyclopedia for free access.

Online encyclopedia and community of mathematical knowledge. Provides collaboratively-created content.