Annotate Anything: Add text or image highlights, notes, and tags to webpages, PDFs, YouTube, and Bilibili.
目前在B站的“稍后再看”页面中，无法为视频标记视频帧，希望能够将视频帧标记功能扩展至“稍后再看”页面。
A fantastic tool to manage highlights with original html. For free!
有个bug，就是youtube视频有时候关了，但是仍然会存在另外一个流在播放。有声音但是没画面。卸载重装又好了
https://pagemarker.org
https://glasp.co
https://web-highlights.com/
https://collabwriting.com/
https://bluf.ai
https://hypothes.is
https://annotate.net
https://annotatepdf.io
https://gosnippet.com/
https://substital.com/
https://wireframeit.com
https://mapify.so/
