STL for Sketchup

Executive summary: A+; would download again. As distributed (at least for Mac), only supports SU 7. However, I found that by simply copying "/Library/Application Support/Google SketchUp 7/SketchUp/plugins/stl4su.rb" to "/Library/Application Support/Google SketchUp 8/SketchUp/plugins/" it worked just fine with SU 8. I'm sure you can do something similar under Windows. There's no documentation other than the README file, but usage is trivial: import via "File > Import..." and export via "Tools > Export to STL". One caveat: STL files have no unit or scale information in them, so you need to pay attention to your export units and your import options. That's not the fault of the plugin, it's just the way STL files are. Once I realized that you need to set your import options, it worked perfectly with both a model created in SU, and a much more elaborate part created with AutoDesk Inventor. This is probably the best tool to use to quickly validate STL parts generated by other cad software. One more caveat: this tool only allows you to export an entire model at once. There is a "Tool > Export to DXF or STL" plugin that will export a subset of a model, but I forget where I got that one.