OpenNote was built to be an open web-based alternative to Microsoft OneNote (T) and EverNote.
License: Open Source
Apps available for Self-Hosted
Gruik is a free and open-source note-taking service. Developed by Adrien Pétremann
Apps available for Online Self-Hosted
OpenNote focuses on real-time collaboration and ease of use, making it ideal for teams. In contrast, Gruik offers powerful organization and customization options, catering more to individual users and those who prioritize extensive note management.