Google has released a free version of its recently acquired 3D-modelling application SketchUp.

The company acquired SketchUp @Last Software in March. Versions of the application are available for Windows 2000 and Windows XP Home and Professional editions. A version for Mac OS X is in development, the company said.

Google is also launching a website - 3D Warehouse - where SketchUp users can store and share their designs and collaborate.

SketchUp has also been integrated with Google Earth, so that now SketchUp designs can be integrated with that popular mapping application, Google said.

The free version of SketchUp is for personal use only. It is based on the existing SketchUp Pro 5, a fee-based version with a commercial licence and more-advanced features.

The decision to release a free version of the application matches Google's mission to make information "accessible and useful", the company said.