Open source annotations projects
Every project in the registry tagged annotations, ranked by real GitHub adoption.
Web Extension for saving a faithful copy of a complete web page in a single HTML file
Automatically generate RESTful API documentation with Swagger 2.0 for Go.
A JavaScript library for web-based content editing.
This library provides advance views for lists and stacks. Some of the views are build on top of RecyclerView and others are written in their own. Annotations ar
Frequently asked questions
How many open source annotations projects are there?
This registry tracks 4 projects tagged annotations, with 40,729 GitHub stars between them. The most-adopted is SingleFile at 22,811 stars.
Are these annotations projects free to use?
Yes — 4 of the 4 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which annotations project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these annotations projects still maintained?
2 of the 4 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.