The Blender Foundation has finally released Blender 2.61. Most notable in this release is the new render engine Cycles, the Camera Tracker, Ocean Simulation texture and Dynamic Paint. Key features you can see below such as download link. This realese also brings 180 bugs fixes. the Blender team are aiming for a regular two-month schedule with the 2.6x releases – a considerable increase in frequency over previous development cycles.
Cycles Reneder Engine- it is a raytracing based render engine with support for interactive rendering, a new shading node system, new texture workflow and GPU acceleration. It is still in development, and more production features are planned to be added, this is the first preview release.
Dynamic Paint- new modifier and physics system that can turn objects into paint canvases and brushes, creating vertex colors, image sequences or displacement
Motion Tracking– allows to reconstruct camera animation from real footage, and composite 3d rendered object into movie clips
Ocean Simulation- simulate and generate a deforming ocean surface, and associated texture, used to render the simulation data
Python API- has been extended for closer integration, a mechanism to detect changes in scenes and persistent callbacks were added, the noise module was updated, and easier access to library datablocks was added, along with various other changes
Add-ons- Adobe After Effects exporter, Atomic Blender (Protein Data Bank) file importer, Acclaim and C3D motion capture importers, and Nuke camera animation exporter and importer
More features- 3D mouse color wheel editing, more translations to other languages, node muting improvements, region drawing tweaks and many others
For download or for see full list of change visit: Blender