FRCTL

Live visuals have always meant a pro VJ tool like Resolume, Synesthesia or TouchDesigner. Those are powerful, and I respect them, but they're desktop installs with a real learning curve. The pro versions cost hundreds at a minimum, and they need a dedicated machine and someone who knows how to run it. That keeps audio-reactive visuals locked to the main stage.

FRCTL has deep features, but super easy to use and runs smoothly in a browser tab. Any laptop plugged into any screen or projector becomes a visual rig in minutes. The free tier includes live mode, and commercial use starts at $12/month. Once it's that cheap and portable, you can put visuals anywhere:

Festivals, concerts and brand activations, clubs and venues, artists.