LMS Explorer is a tool designed to admin several Moodle instances at same time and from a same place. It is a Windows desktop application that connects with Moodle instaces using API Rest. Just execute the application and it will read a .ini file with all Moodle instances you want to connect and it will try to connect to all using API REST protocol. That way you can get information of all your Moodle instances in an unified way.
For basic features can watch this video:
You can find the source code and releases in the github repository
If you want to test it in a development enviroment you can find in the test project directory some csv files with 12.000 users and a lot of courses assignements to deploy it in a Moodle test instance. For fast deployment can use Virtualbox with Bitnami virtual machine image for example.