With Leopard's official announcement, Apple now details a list of 300+ new features that can be found in Mac OS X 10.5.
Sitening compiled a list (with descriptions) of 16 of what they felt were the coolest least known features coming in Leopard.
TextEdit: OpenDocument and Word 2007 Formats
Terminal: Workspaces
.Mac Sync for System Preferences
Guest Log-In Accounts
Grammar Check
Scroll Non-Active Windows
Printer Drivers via Software Update
PDF Manipulation in Preview
Self-Tuning TCP
Archive Mailbox
SMS Forwarding
Event Dropbox
Font Auto-Activation
Instant Screen Sharing from the Finder
Wikipedia in Dictionary
Synchronize with Yahoo! address book
Yesterday, we took a look at some of the under the hood improvements and system requirements as compared to Tiger.
Meanwhile, AppleInsider looks at iCal 3.0 and Safari 3.0, and Apple has updated their website, which shows off the major new features of Leopard.