[Please let a comment if you like it or if you have any feature idea; I do it for fun and I couldn't develop some features if these aren't useful for me (e.g. GTalk).]

Gmailbox
Turning Gmail into Mailbox (in progress)
This version emulates the iPad interface, with the dark left column.

To use with any background:
http://freestyler.ws/style/100329/gmailbox-gmail-mailbox-universal

To use the Mac style (all white):
http://freestyler.ws/style/109238/gmailbox-gmail-mailbox-mac

New: 3.2 Changed message window background to grey. Changed compose window colors.
Ver. 3.1 Changed background of folders and action bars. Added transparent firefox scrollbars.
Ver. 3.0 Changed Action icons. Fixed background. Other fixes.
Ver. 2.2 Added left column 'folders' icons. Suitable for any background (better white or black).
Ver. 1.0 First version, made from Outlook style.

# Outlook, Calendar, Tasks, iCloud, Mailbox, Dropbox, Microsoft, Apple, Yahoo, Email, Mail, Contacts ...