Mike Schinkel

NewClarity

This plugin does what it names says; it omits page templates from the parent theme from the template dropdown when you are editing a “Page” in the WordPress admin.

Omit Parent Theme Page Templates

Omits Parent Page Templates from the "Page" edit screen in the WordPress admin.

Mike Selander

Simple Frontend Template Display will show the name of the template that you’re using in the toolbar when you’re in the frontend of your website. You can use this to keep track of the various templates you’re using without having to hop into the edit screen every time you want to check a template.
All you have to do to get this working is to install the plugin. It will then automatically show up in the toolbar on all pages on your site.

Simple Frontend Template Display

Adds an admin toolbar menu item that displays the current page template.

Omit Parent Theme Page Templates vs Simple Frontend Template Display