What engine would you recommend for testing employees?

Question

CMS

I ask the IT community to advise an engine for checking and controlling the knowledge of employees.
So that you can create a test, send it to employees for passing. They answer and immediately the result was passed / not passed, and detailed statistics were given to the administrator.
Preferably without paid solutions from asylum-web-studios.
Interested in functionality: location on your server, archive of tests, creation of tests, some minimal set of customization.

Answer 1

There is a large software product for your tasks, but it needs to be finished, a lot of finishing. This is WebTutor. True, he is paid.