PendulumArray by John F. Lindner written in Swift for iOS, iPadOS, macOS (2023)Chaotic Flows by Bryan Prusha & John F. Lindner written in C for Mac OS (1997); extended by Josh Bozeday for OS X (2000)IC4D by Joshua Fagans & John F. Lindner written in Obj-C for NeXTSTEP (1993); extended by Scott Hughes for OS X (1999)C-Ball by Thomas Taczak & John F. LIndner written in Pascal for classic MacOS (1991); extended by Amy Lytle for OS X (2001)