WordPress 3.5 has been released and now available for free download. The update includes new Media Manager, new default theme, and Retina-Ready.
It was a painful experience to upload media files and create gallery into your posts. WordPress 3.5 has improved the Media Manager. Now you can insert multiple images at once with Shift/Ctrl+Click, create multiple galleries per post with drag-and-drop reordering, inline caption editing, and simplified controls.
WordPress 3.5 includes a new default theme, Twenty Twelve, which has a very clean mobile-first responsive design. For new installation, WordPress Admin panel has a new welcome screen and Link Manager is hidden. The Admin panel is high resolution Retina-display ready.