Open Plov License Version 1 (OPLv1)

Permission is granted for free use, copying, modification, and
distribution of this software for non-commercial purposes,
provided that this license notice is retained.

Any derivative works and modifications must be distributed under
this same license with open source code.

Closing the source code or distribution under a proprietary
license is prohibited.

Distribution of compiled (binary) versions of this software
without publicly available source code from which the software was
built is prohibited.

Code under this license may only be combined with code under
licenses that require maintaining open source code.

Combining with code under licenses that permit closing source code
or unrestricted commercial use is prohibited.

When combining with code under other copyleft licenses, the
resulting work must comply with the requirements of both licenses.

Project dependencies are not subject to the requirements of this
license and may be used according to their own terms. This license
applies only to the original project code and its derivative
works.

The software is provided "as is", without any warranties. The
copyright holder is not liable for any damages arising from the
use of the software.