SPEventsManager - manage event handlers on your SharePoint 2007 lists
Gaetan BOUVERET wrote another great tool: a web interface to manage the event handlers on your SharePoint 2007 lists, the SPEventsManager. This project is hosted on CodePlex. The tool is available as a SharePoint Solutions file (.wsp file) that can be easily installed on your SharePoint farm. He announced the new tool in this blogpost. It is a pity his blogposts are in French, not my best language...
Also checkout his other tool at CodePlex: SharePoint Inspector, in his own words:
SharePoint Inspector is a free tool to browse your SharePoint 2007 farm. When I talk about SharePoint 2007, I mean Windows SharePoint Services v3 (WSS v3) and Microsoft Office SharePoint Server 2007 (MOSS). Its main purpose is to help SharePoint developer You can see objects composing its structure, get their properties by reflection, which can be very useful when you want to check if your code does what it should do. You can use also some advanced features like activate/deactivate SharePoint features, add/remove event receivers, manage your recycle bin.