This is the second webpart in the package csegAlerts (the first is here) this webpart show all users in a site and yours current alerts.

The webpart is called csegAdminUsersAlerts, you can delete one or all alerts for an user.

If you has installed the previous version, please unistall before install the new one. 

csegAlertsWebPart.zip (7,43 KB)

I am working in three webparts for handling alerts in Sharepoint, as advance here is first of them. 

csegUserListsAlerts

This webpart shows

1) A drop-down list with all the lists of the Web site in where it is located. 
2) The name of the current user
3) One lists with all the users of the Web site
4) The alerts for the selected list

You can do:

Eliminate the selected alert
Eliminate all alerts for the current list
Add alert to selected users (specify type and frecuency)
Add alerts to all users

The webpart screenshot has texts in spanish but the download webpart is translated to english.

The next webpart would show a drop-down list with all users and your alerts. The third webpart is a webpart for information to show current user alerts.

csegAlertsWebPart.zip (7,43 KB)