Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
YouTube SEO Tool Station - ytseotoolstation is designed for youtuber's who want to get more views and subscribers on their youtube channel.
BookmarkSheet - Your bookmarks in Google Sheets
RedditVids - Discover videos shared on Reddit in a more easy, curated way
Annotate.tv - Optimize your learning on YouTube
Oyper - Oyper specializes on making shoppable video content.