PowerInbox brings apps to your emails, just like the iPhone brought apps to your phone.
Runs on Hotmail, Outlook, Yahoo and Gmail (combined 1.5B accounts) with more coming soon.
- Fb email lets you comment back on a photo http://vimeo.com/powerinbox/facebook
- Linkedin emails let you accept invites http://youtu.be/lIvCQK9AmSw?hd=1
- Twitter follow email lets you tweet and follow back http://vimeo.com/powerinbox/twitter
With PowerInbox, the email is the app.