Bookmark It - Create awesome notes on YouTube videos
Magic Playlist - Get the playlist of your dreams based on a song
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Spotalike - Spotify playlist with similar songs, according to Last.fm
Video Search for YouTube - Search any YouTube video like a document.
Playlist Machinery - Tools that help you create & organize your Spotify playlists