I have written and released many Apple II and Apple IIGS programs, including:

Apple II

1. •Infiltrator - space arcade game
   

2. •KeyWin - Applesoft BASIC windowing system
   

Apple IIGS

1. •SuperMagic - graphics and animation library
   

2. •Mandelbrot II GS - best fractal software for Apple IIGS (shrinkIt version)