TubeLister - Generate a YouTube playlist from your opened tabs.
Playmoss - Create playlists from YouTube, Vimeo and SoundCloud
OrganizeTube - Create video playlists from Youtube, Vimeo and other sources
Playlist Machinery - Tools that help you create & organize your Spotify playlists
Vidlis - Create music playlists from YouTube videos.
Audioship - Upload audio to YouTube or Facebook