Annotable vs Snap Markup

Annotable is an open-source alternative to tools like Evernote and OneNote. It helps users organize, annotate, and search notes consisting of formatted text as well as images and PDFs. It has support for tagging and categories as well as various formatting options.

Snap Markup is a screenshot annotation tool that allows users to easily add captions, comments, shapes, and sketches on top of screenshots. It has features for quickly editing images and sharing screenshots with team members.