Pete Mall

Adds advanced plugin installation options to WordPress. Allows the user to install the development version of a plugin. Adds a link to the top of the plugin install page to install the development version of the plugin. If the development version is not available then a message is displayed at the top of the plugin install page.

WP Plugin Installer

Allows the user to install the development version of a plugin for testing purposes.

Andrew Skochelias

Pavlo Kotula

WordPress changelog – logs any uploads, updates, installations/uninstallations, activations/deactivations of themes, plugins and WordPress core. 
It could be helpful to easily find out the moment when something went wrong with your site and quickly fix the issue.
The plugin logs such actions: 
* Theme installation 
* Theme update 
* Theme activation 
* Theme deactivation 
* Theme removal 
* Plugin installation 
* Plugin update 
* Plugin activation 
* Plugin deactivation 
* Plugin removal 
* Translation update 
* WordPress update 
* WordPress reinstall

WordPress Changelog

It is a very handy plugin in a case when there a lot of people are working on the project. So you can track when and what was updated or installed. And with help of this plugin, you can quickly find out what caused any issues.

Useful plugin

WordPress changelog - logs any uploads, updates, installations/uninstallations, activations/deactivations of themes, plugins and WordPress core.

WP Plugin Installer vs WordPress Changelog