There is Aplette which supposedly integrates nicely with other Unix tools. It's a port/update of the earlier openAPL source code, which I think was done by Ken

There is Aplette which supposedly integrates nicely with other Unix tools. It's a port/update of the earlier openAPL source code, which I think was done by Ken Thompson? Here: https://github.com/gregfjohnson/aplette https://github.com/gregfjohnson/aplette