CONV. - Convert YouTube video to MP3, GIF or MP4
Visualify - Visualize your top artists on Spotify
Youtube Plus - Home of the extension YouTube Plus that allows you to experience more on YouTube - ParticleCore/Particle
SYQEL - Bring your music to life
GifRun - GifRun provides easiest way to find and create animated GIFs from YouTube, Video, Images or Vine...
Kaleidosync - Kaleidosync is an all-in-one Spotify music visualizer that is all set to deliver a top-notch music experience with real-time support.