...to make your life easier:
- Smustard(TM) - the Companion to Sketchup(TM) (this one has free and commercial plugins as well - hope it's not a problem to post it here)
- Ruby Library Depot Here are the contributions of the Ruby developers of the SketchUp community since 2004.
- SketchUp Plugins Blog
- Jan Sandtröm (Pixero)
- Soap Skin & Bubble
- Mario Pehle (azuby) under Software
Here are some instructions how to install these plugins (certainly valid not only for Smustard scripts). Also, if you use SU 7,you willl have to install them in the respective app's folder.