Sourced clones is finding a program else where under the right license performing the same tasks. Normally not like clean room clones. Think all the versions of tetris that are out there. Lot were created by people have to code a tetris like program for exams and the like. Some if the simple programs like notepad in windows was also used as something to replicate in exams. No disassembling or test casing is normally used in the production of sourced clones. clean room clones. Is suggesting reverse-engineering ie someone disassembles and documents and someone else build clone of program from documentation. Clone don't automatically mean that any reversing was done. Functionality cloning can be done from something as primitive as screen shots of the application being cloned. Lot has to be talked about on a per application base. You can be sure the methods used are legal.
