Blender

Hey, people! I am picking up Blender for 3D modelling! It can be used to render SketchUp model, too! What's more, it's free!

Here is the download page:       http://www.blender.org/download/get-blender/

If you want to import a Google SketchUp model to Blender using free Google SketchUp, there are two ways. If you are using old SketchUp (I don't know which version, but for certain older than version 8.0), click file, export, then you will be exporting into .kmz file. It is actually a .zip file, so just rename the .kmz into .zip. Then, open the zip file and go into the model folder, find a file that ends with .dae. It is a Collada format (I don't know what it is). This way of exporting can be found here.

For the newer version of free Google SketchUp, you can export as .dae directly by choosing the .dae at the export type option on the export window.

To import the model to Blender, open the Blender software, click File -> Import -> Collada. Boom! It's there :) I got trouble on my trial importing. The 'origin' of the object is not at the center of the object, which caused trouble in moving, scaling and rotating. You can google about it if you find trouble, too.

By the way, Google has sold SketchUp to another company in a recent news. So, look out for it!