Apple labeled this version as “GM”, also known as Golden Master, which essentially means that this is the same build that users will see. It also usually means that a launch isn’t too far behind…
Developers can download OS X Mavericks GM from Apple’s Mac Dev Center.
While Mavericks didn’t get the design overhaul that iOS 7 did, it did get a number of new features including a tabbed Finder, Safari improvements, and desktop Maps and iBooks apps.