PraxisCORE
· Forest-of-actors runtime supporting real-time systems and real-time recoding - bringing aspects of Erlang, Smalltalk and Extempore to Java.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window praxiscore-5.7.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.