cmorillas1

It provides an alternative way of getting data from an external database: 
* Google Sheets 
* SQLite 
* MySQL 
* Progresql
A SQL query can be configured to get data from these databases and be used as method for authentication or for populate post or pages.
The plugin is modular, so, new actions for the data gathered can be added to the plugin with minimal programming. You can contact me at cmorillas1@gmail.com

External Database Based Actions

Get data from external database (including google sheets) and do configurable actions based on these data.

hxh90

Easily log any event on your WordPress site to text file. When simple echo and var_dump just won’t do.
<h4>Features</h4>
<ul>
<li>Clear log with one click</li>
<li>Refresh log with one click</li>
</ul>

Plain Logger

Very nice plugin, some things can be tweaked (for example the second param can be set as optional, but other works very good).

Simple but nice logger

Requires at least: 3.9 Tested up to: 4.7 Stable tag: 1.1.2

External Database Based Actions vs Plain Logger