The Applesauce project was started in March 2017 by John K Morris of EvolutionInteractive.com. John is a well know programmer in his own right, however this is his most important contribution to the Apple II Community to date.
What Is Applesauce
Applesauce is two parts - hardware and software. The hardware aspect of the project is a "Controller Interface" that allows an Apple II Floppy Drive to be connected via USB to another system. The software then controls the Floppy Drive and captures the date stream.
Blah blah... crap.
Info on exactly what is the Teensy and what it does.
What it is and why we need it.
EDD Is Dead
As quoted by Antwion, and why.