Peter Lawrenson

By default, WordPress will load every plugin on every page. The Simple Plugin Selector (SPS) plugin allows the administrator to select which plugins are used on a page-by-page basis. This prevents unneeded plugins and plugin support files from loading. HTTP requests and download size will be reduced, so improving website performance for the visitor.
For example, you probably use your contact form plugin only on your Contact Us page. SPS allows you to deactivate it when the page request is for one of your other pages, so your users don’t download your contact form style sheets and scripts unnecessarily.
The plugin has a user-friendly interface, so the administrator can see easily which plugins are running on each page.
Plugin filtering is disabled in admin context.
Not for newbies! The administrator must have a clear grasp of which plugins are required for each page, otherwise some pages will have errors because a required plugin is not loaded.
<h3>Deactivating</h3>
Deactivating SPS in the normal plugins list will deactivate plugin filtering and remove the SPS file from the mu-plugins directory.
Removing the SPS plugin using FTP will leave an unwanted SPS file in mu-plugins, but plugin filtering will be disabled.
SPS settings are not deleted by plugin deactivation or deletion. Reactivating should pickup filtering where it left off.
<h3>Settings</h3>
Go to Dashboard > Settings > Simple Plugin Selector to set which plugins are required on a page by page basis. If the site has cache or optimize plugins, they should be cleared after changing any SPS settings.
If a new page, post or product is created, all plugins will be activated for that by default until set otherwise in SPS settings.
If a new plugin is activated, it will be loaded for all pages by default until set otherwise in SPS settings.

Simple Plugin Selector

Select which plugins are activated on a page-by-page basis.

jamiebergen

Have you ever returned to a site that you built a while back and asked, “Why did I install this plugin?” This plugin provides an extra column on the Plugins page that enables you to add, edit, or delete notes about the plugins you have installed on a particular site. These notes are intended to provide documentation regarding why a particular plugin was installed and how or where it’s being used.
Features
<ul>
<li>Add as many or as few notes as you need for each plugin.</li>
<li>Edit or delete notes as desired.</li>
<li>Select an icon to go with each note to quickly convey what type of content it contains (e.g., info, warning, link, etc.)</li>
<li>Format notes using basic HTML tags if desired.</li>
<li>Any links included in the note will be automatically converted to <code>target="_blank"</code></li>
<li>Notes are added and updated via Ajax, avoiding slow page reloads.</li>
<li>Notes also display on the WordPress Updates page for any plugins that need to be updated.</li>
<li>A filter is provided if you would like to display notes beneath the plugin description instead of in a separate column.</li>
<li>A filter is available to selectively hide or display plugin notes in the admin.</li>
</ul>

Plugin Notes Plus

Very useful plugin to note why a certain plugin was installed on the site and any additional context around it, for other admins. Helps in housekeeping especially when there are more than one admins that try different plugins and forget to remove anything that is not wanted.

Super useful plugin for multi-admin sites

Does one thing and does it well.

I was about to build something like this and was thrilled this plugin not only existed, but is very well done! Thank you!

Exactly What I Needed!

Adds a column to the Plugins page where you can add, edit, or delete notes about a plugin.

Simple Plugin Selector vs Plugin Notes Plus