GitHub is the best place to share code with friends, co-workers, classmates, and complete strangers. Over t...

Discourse is a simple, flat forum, where replies flow down the page in a line. Replies are attached to the ...

Flarum is the next-generation forum software that makes online discussion fun. It's simple, fast, and free.

Easily add sections. Create questions and answer them on the fly. Drag and drop and move things around. Edi...