Ronald Huereca

Metronet Log provides a WordPress API for date-based data storage based on a user ID. It’s up to the developer to implement the actual logging and data retrieval, but the plugin provides many helper methods.
You can view the full documentation for the <a href="https://github.com/ronalfy/metronet-log" rel="nofollow ugc">WordPress plugin on Github</a>.
Contributions to this plugin are welcome, so please feel free to weigh in via the support forums here and contribute code on <a href="https://github.com/ronalfy/metronet-log" rel="nofollow ugc">Github</a>.

Metronet Log

Provides a WordPress API for date-based data storage based on a user ID.

Jan Štětina

This plugin shows which user has access to which posts under Users administration menu. 
User names are in columns so it is suitable only for smaller counts. Works only in conjunction with User Access Manager and requires PHP 5.3.
It was developed only as helper tool for another plugin which I am going to create in near future and I guess it can be helpful if you are interested how User Access Manager works. Plugin code is (or tries to be) well documented.
This plugin will probably not be updated any further. I provide no guarantees whatsoever.

Post Access Overview

Show who has access to which post in a single table. Works in conjunction with User Access Manager.

Metronet Log vs Post Access Overview