Quickly scan large piles of paper, using only the scanner as a user interface. Command-line program that uses SANE to access the scanner. Batches and their parameters are configured by feeding special QR codes into the scanner.
A little action game for the Apple II, kind of an inversion of the idea of Tetris.
Super-Mon is a souped up extension of the Apple II System Monitor. It's paired with NakedOS, a fast and small operating system for the 5¼" Disk ][. Both are CC0 licensed.