SharePoint Utility Pack

If you are looking for a tool for Site Mangement with following features :

• Recursively deleting sites
  
• Create a list in multiple sites at once
  
• Modifying field settings - some internal settings that you cannot modify in the regular interface, and the option to modify lists with the same name in multiple sites at once
  
• Push a web part to multiple sites (a specific page in each site) at once
  
• Manage list event hanlders (register and remove event handlers from lists)
  

Then you need to have this tool by Ishai Sagi

http://www.codeplex.com/spstipsUtilityPack

The event handler functionality has proven to be of great help to me.