http://forum.xda-developers.com/showthread.php?t=721780
This link will send you to a download for Mission Control, a volume widget.
To find apps and widgets for the edge we have http://www.slideme.org/ and http://andappstore.com/AndroidApplications/ in addition to the app store for the edge. Other than that just google, adding apk, or android app to the type of app you want. Use some caution on file share sights though.