[vulpes]

Surprised there isn't any votes for Postbox app (http://getpostbox.com).

  * It integrates well with gmail 
  * does great with multiple accounts 
  * multiple outgoing addresses 
  * great search functionality 
  * GTD tools such as assigning emails a topic. 
  * Integration with facebook/twitter to pull up contact info 
  * Extensions such as calendar and contacts

Based on thunderbird, all around awesome client.

[HalcyonMuse]

I, too, was surprised there weren't more. I use this; I like it quite a lot. The search feels quite superior to Thunderbird's native search.

[staunch]

No Linux version :(

[eapen]

postbox is not free :(