Flow-e is a visualization layer on top of your Gmail or Outlook inbox. It provides an elegant Kanban-like workflow that's combined with the ideas behind Inbox Zero and GTD. Flow-e eliminates the need of external task management tools and transforms your inbox into a central To Do app.
Sortd - Rated the #1 App for Gmail
Spotify - Map shows when two people play same song at same time
KanbanMail - A Kanban board for your emails.
SoundCloud - Enjoy music & follow favourite artists
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm