Better Plugin Page brings a few valueable enhancements to the Plugin Management page: tiny icons, less clutter, quick action links. Handy for those who have 70+ plugins on their blog.
Check the <a href="http://planetozh.com/download/plugins/better-plugin-page-demo/" rel="nofollow ugc">demo here</a> and visit the official page of <a href="http://planetozh.com/blog/my-projects/wordpress-better-plugin-page/" rel="nofollow ugc">Better Plugin Page</a>
Tip: To keep track of this plugin’s evolution and features, you are advised to subscribe to the <a href="http://planetozh.com/exit/feed" rel="nofollow ugc">author’s feed</a>

Ozh' Better Plugin Page

Adds icons, quick action links, and less clutter to your plugin management page.

thewebist

LocalDev Switcher allows you to seamlessly toggle between production plugins and their local development versions.
Usage:
<ol>
<li>
Place your local dev version of a plugin in:
wp-content/plugins/localdev-{plugin-slug}
</li>
<li>
You should now have two directories containing the same plugin inside your <code>/plugins/</code>:
<ol>
<li><code>/plugins/your-plugin/</code> – Loaded from VCS/WordPress.org Plugins/etc.</li>
<li><code>/plugins/localdev-your-plugin/</code> – Your local development version</li>
</ol>
</li>
<li>Use LocalDev Switcher to toggle between the version-controlled and local versions. The toggle UI appears in the plugin meta row.</li>
</ol>
LocalDev Switcher prevents double-loading and ensures only the desired version is active.

LocalDev Switcher

Easily switch between version-controlled plugins and local development versions by toggling in the Plugins screen.

Ozh' Better Plugin Page vs LocalDev Switcher