As I find start to use new ones, I’ll post them here
- MBTA on Google Maps (info)
- Autosave Gmail (info)
- Gmail Delete Button
- Click on mailto link – open Gmail Compose message
- Google Fool (info – you have to read this first)
- MSDN Language Filter (info)
Also, if you want to know more about developing on greasemonkey, then dive into greasemonkey (.org).