For me it's been the disassembling of most of my original Amiga software in order to bug fix or improve upon it.
Using ReSource V6, you can with a lot of patience and time, disassemble all your Amiga software into source code. Then with even more patience and time you can study the source code make improvements,fix bugs or add new features. Then reassemble and you have a new & improved version of whatever.
Most of the software I use on a daily basis on my Amiga, eg: DirWork, SampleZ and almost all files in the C: dir have been improved upon, bug fixed or optimized in some way.
It took a long, long time to do, but it was well worth it in the end...
