Bookmark It lets you create bookmarks for YouTube videos so you can quickly jump onto the useful parts of the videos.
FaviconBar adds favicons to all of the Favorites websites in the Safari browser.
Dewey Bookmarks adds more features like custom tags and smarter search to your bookmarks in Chrome.
Visual bookmarks lets you add and view bookmarks in a visual way rather than the traditional text way in Chrome.
Bookmarks Backuper backs up all of your bookmarks and saves them on Google Drive for you to access them from any device.