SpeedTree Unity v7.1.0 (Windows)

SpeedTree for Games, the vegetation software making AAA games great since 2003, has come to Unity 5! In response to strong customer interest, IDV is offering a preview version of SpeedTree Modeler for Unity now, for Unity users that want to get an early look at this exceptional vegetation modeling tool. Featuring our unique, award-winning combination of procedural plus hand-modeling approach, SpeedTree is a design package powerful enough to meet virtually any vegetation modeling requirement, from architectural backgrounds to Oscar®-winning visual effects. Feature highlights (hyperlinks go to relevant SpeedTree docs pages):

Scalable wind effects, including Wind Wizard
Seamless LOD tuning
Create unlimited variations with one click
Branch seam blending
Sub-division surface modeling
Add collision primitives automatically or manually
Modeling with mesh forces (e.g. grow trees around or through 3D meshes)
Sample broadleaf (desktop & mobile resolutions), conifer, palm, and mesh force example trees included

http://www.speedtree.com/unity/