Spy on all events, the application code listens for, on a page.
Event Spy extends the developer tools pane, with a log of all the registrered events and their corresponding event handlers.
Event Spy will only show you the events that actually has an event listener, highlighting the event target on the page.
0.5.2 - greatly improved performance and memory consumption
Contrary to other extensions/bookmarklets like Visual Event, Event Spy will show you the dynamically added event handlers, and it works across frames of the page.
You can follow the development of Event Spy over at the project blog on: http://jfsl.dk
Event Spy is open source, please parcipate in development over at github: https://github.com/jfsl/eventspy
Feel free submit feedback, bug reports and feature requests.