Vision Self Dissolving Files v1.5 - Written by Kerry Messana (1990 Vision Software Co.) - This small 12 block program for the Commodore 64 is pretty amazing.  Not only can this dissolve files with the .VSD extension, it can also create .VSD files.  It seems very similar to Lynx, but is compatible with any drive / device, including CMD HD, and SD2IEC devices.  Not sure how I missed this one over the years.