ZMPP2 is the second generation of the Interactive Fiction interpreter "Z-Machine Preservation Project" for Java-based systems. It is a result of the experiences made with 3 different Z-Machine implementations in three different languages: Java, Ruby and Erlang.
The version that is available on Android Market is based on the code in this project.
ZMPP2 is written in Scala and currently plays Interactive Fiction written for the Z-Machine and Glulx standard.
These details are provided for information only. No information here is legal advice and should not be used as such.