Add data columns to Oxygen's admin templates page. These help you stay on top of your templates.
Last Modified: Show the date of the last modification.
Parent: If the template inherits from another template - like "Main" or other templates with inner content - the name of the inherited template and a link to it are displayed.
Revisions: Display the number of revisions that are saved for the template. Also includes a button to purge those revisions.
Snapshots: If you're using the Snapshots extension, this will show the number of Snapshots your template has. Like revisions, it also includes a button to purge the snapshots associated with that template.