Playlist Machinery - Tools that help you create & organize your Spotify playlists

Xmind - Xmind is a brainstorming and mind mapping application.

BeatMix - Enables Shuffle and Radio for multiple artists in Spotify

MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.

Magic Playlist - Get the playlist of your dreams based on a song

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.