Hypothes.is is open source software that facilitates a layered and collaborative means of creating and sharing annotations and conversations about content on the internet, including news, blogs, scientific articles, books, terms of service, ballot initiatives, legislation and other content.

If you need a tool for collaborative writing and publishing in LaTeX format, Overleaf may work for you. It strives to make the whole process of writing, editing and publishing scientific documents quicker and easier. Overleaf provides an easy-to-use LaTeX editor combined with real-time collaboration that produces content automatically in the background as you type.

Scalar supports born-digital, media-rich scholarship and publishing. With Scalar, you can create an interactive, nonlinear ebook with embedded media, charts, and more.