Examples: Springs
Link: https://p5js.org/examples/simulate-springs.html
This example demonstrates how to use physics to give objects character and dynamism.
Libaries: p5.localmessage
Link: https://github.com/bmoren/p5.localmessage
This library interests me because the ability to send messages from one sketch to another allows for multi-user interaction!
Glitch: handsfree-starter
Link: https://glitch.com/~handsfree-starter
Head controlled interactive art looks fun and innovative!