cleanscript

A very simple plugin that provides information about the Custom Page Templates available in the theme: What they are, which are not used and where the used ones are used, selectively.
Main features: 
Available page templates list 
Unused page templates list 
List of page templates with checkboxes that output when submitted the links where they are used

Cleanscript – Page Templates Info

Find information about your page templates. What they are, which are not used and where the used ones are used, selectively.

EdwardBock

Show environmental info on your admin bar so you will never accidentally edit production site contents instead of stage or the other way around.
<h3>Arbitrary section</h3>
There’s a documentation at https://github.com/palasthotel/wp-environment-info

Environment Info

Show environmental info on your admin bar.

Cleanscript – Page Templates Info vs Environment Info