I'm wanting to do digital art, and do it in Linux. I check out Blender, but I hard to remember how to do stuff in it. Besides Blender, what other 3D applications are there for Linux? I'm looking for ...

I'm switching over to Linux on my main PC so I can learn faster, but there are certain apps from Windows that I will miss, chief among them is Google Sketchup, only available for Mac and Windows.