open source
Erlen is now free and open source.
Erlen is no longer sold. It is published under the Apache License 2.0, and the whole thing — server code, UI, presets, the setup manual written for an AI, and the tests — is in the public repository. There is no application form and no screening any more: clone it and go.
Open source
Apache-2.0
Free
No application, no screening
Questions about the project go to gakushijob@gmail.com; the terms are set out on the licence and disclaimer page.