Christian Jongeneel

The Theme and Plugin Profiler uses a little known PHP feature known as ticks. Basically, this is an internal event that occurs every time a code block is executed, marked (roughly) by a function call or curly {} brackets.
The plugin uses ticks to collect a list of the functions that were executed, how often they were called and how much time they took in total. The plugin’s option page gives some filters to select and sort the results. This will give developers clues which parts of their code demand scrutiny.

Theme and Plugin (T&P) Profiler

Make your theme or plugin faster, greener and smarter with this plugin, that will tell you which of your functions is eating up most server time.

swergroup

This plugin let plugin and theme authors to display their work in their main WordPress. It provides some helpers:
<ul>
<li>two custom post types: plugins and themes</li>
<li>SEO-friendly URLs</li>
<li>fetch (and cache in transient) plugin/theme info from the latest readme.txt file</li>
<li>fetch (and cache in transient) rating / support / downloads info</li>
<li>plugin info from readme file as custom post metadata</li>
</ul>
Planned in the next release:
<ul>
<li>widgets with plugin info</li>
<li>shortcodes</li>
</ul>

Developer Showcase

Plugin/theme showcase plugin for WordPress plugin/theme authors and developers.

Theme and Plugin (T&P) Profiler vs Developer Showcase