vdNote - Share noteworthy moments from YouTube videos.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Amie - GitHub for research and data science
BookmarkSheet - Your bookmarks in Google Sheets
Grid Note - Grid Note is an app by Sumi Interactive that comes up with features to help you in adding notes in a grid layout to share your ideas and thoughts with the outside world.
Siimpl Bookmarking - Start collecting and organizing what interests you