Magento event manager is the only and very best magento event manager for magento platform everything is configurable form the admin .
1 - Latest Event Supported
2 - Completly manager via Awesome Calander .
3 - All the modern browser supported like IE6,7,8 ,Firefox,Chrome,Opera etc.enjoy ;)
4 - You can use This extension on multiple places within a single page.
5 - This Plugin Has Endless Utility .
How to Use :
1)First download the Module.
2)Copy Or Install the files in their corresponding location in magento_root folder.
3)Now Go to System->Cache Management flush all of cache Memory.