Open Source #annotation Projects

Self-hosted library for ebooks, comics, and audiobooks with built-in readers, metadata lookup, and Kobo and OPDS sync.

A free, local PDF editor for mobile, desktop, and web. Annotate, fill forms, sign, and redact with no account or uploads.

Self-hostable open source video review and asset collaboration platform, a privacy-friendly alternative to Frame.io.

Self-hosted reading server for manga, comics, and ebooks with responsive web readers, smart filters, and an OPDS feed.

Desktop app for organising, describing and annotating photographs of archival research material.

A free, open-source PDF editor for Linux that lets you edit text, images and objects, merge documents, and export to DOCX, PPTX and more.