LJ comes with different plugins. They are handy and nice code example but not necessary, you can generate your pointlists and send them directly to redis keys.
Plugins list :
Square : A very basic example to understand how to easily program your own plugin.
Custom1 : A copy of square, you can modify.
Planetarium : A 4 lasers planetarium.
fft3 : Example how to make LJ audio reactive.
LaserPong : Our laser Pong is back !
pySimu : A full speed laser simulator.
Pose : Display json openpose skeleton animations ans starfields.
Textcycl : Cycle some words with adjustable length on one laser.
LiveWords : Fill the input form and it's displayed. One word / laser.
Anaglyph : A green/red rotating cube. Try it with green/red 3D glasses !