Commercial platforms using Planet Nine
PopupsPlease 
- Never miss a Popup, and impress your friends with you knowledge of the cool stuff going on in your town.
Techne Legalis - a legal tech platform automating administrative court tasks.
HomeVentory - A platform for inventorying your home to make it easier to sell or replace the stuff you own.
Planet Nine's apps
Nullaris - a suite of interoperable consumer apps that are "featureless."
The Advancement - The browser extension that allows for interaction with the Planet Nine platform.