SeaMonkey  2.0 Beta 2
* Tabbed Mail enables accounts, folders and even single messages to be opened in tabs inside the Mail & Newsgroups window. This feature also enables the Lightning extension to be installed into SeaMonkey for calendering functionality.
* The default theme on Mac OS X was completely renewed to better fit with the look of Leopard and Snow Leopard.
* Reopening closed browser windows (Undo Close Window) is now possible.
* For extension developers, SMILE is introduced, making interfaces known from FUEL and STEEL also available in SeaMonkey.
* Several improvements were made to the recently rewritten download manager.
* A large number of small improvements were made across the suite.