Glasp

Glasp is a browser-extension and web app that lets you highlight and annotate web pages, PDFs, YouTube transcripts, and Kindle books, then organize, summarize, and export those highlights to note-taking apps. It's built for knowledge workers, students, researchers, and content creators who want a visible, shareable learning log rather than a private silo. What most differentiates it is the social layer: alongside AI summaries and a chatbot trained on your own highlights, you can follow like-minded people and discover what others are highlighting.