It's been a little over a year since we started our Autodesk Developer Network plugin of the month series. All 12 plugins are available for download:
Based on number of downloads, these plugins remain popular.
You can see that downloads of some plugins are popular when first released and then taper off. Others have staying power month after month. Not only are these plugins useful, but they include the source code in hopes of inspiring aspiring developers to extend them.
Popular plugins are alive in the lab.