LicenseServer is Free
Provided free-of-charge, the Altova LicenseServer will allow you to request and manage free trial licenses and purchased licenses for Altova desktop and server software products.
All you need to do is install one instance of the Altova LicenseServer on your network and access it from any browser to request new evaluation licenses, upload purchased licenses, and assign them from one central web-based management console to any of the servers on your network.
Instructions for requesting a free server trial using Altova LicenseServer are available here.