SketchUp

Released in 2000, SketchUp is an easy-to-use 3D modeling tool available for free (and as a pro-version) that became quite popular under the ownership of Google starting in 2006. This past April, SketchUp was purchased by Trimble and now with a new release a new logo has been introduced that sheds its Google past. More details and insight into the logo here. Thanks to Phillip McKeown for the tip.