HandUp Campaigns - Assemble your community to donate to those in need
Magic Playlist - Get the playlist of your dreams based on a song
CampaignWith - Teach a class to fundraise for a cause you care about
Spotalike - Spotify playlist with similar songs, according to Last.fm
Dollar A Day - Automatically donate $1 a day to featured nonprofits.
Playlist Machinery - Tools that help you create & organize your Spotify playlists