Fair question given the current state of the project! Right now other than support for GitHub Flavored Markdown and syntax highlighting not all that much! I'm in the process of putting together a project website which has a detailed roadmap for the coming months.

The goal is to have developer centric features like making it easy to embed gists, jsbin and the likes. Also integration with GitHub/GitLab/Bitbucket to showcase the repos you contribute to. Other features like an API, webhooks, 2FA, Oauth planned too.

Probably posted it prematurely but wanted to ship it and get some early feedback.