If you're looking for a competitor to Ultraleap, Hololink is worth a look. Although it's geared more toward creating custom AR experiences for marketing and engagement, its platform can accommodate interactive and immersive experiences built with a drag-and-drop editor. That could be useful for interactive kiosks or digital out-of-home advertising.
Another project worth checking out is Qonqur, which uses webcam-based spatial computing to let people control their computers with hand gestures for digital learning and research. It lets people control their computers with hand gestures, which could be useful for interactive presentations and brainstorming. That could be used for interactive kiosks or educational tools.
If you're looking for something very different, Tobii has more advanced eye-tracking technology. Although its main business is understanding human behavior and decision-making, its products include screen-based and wearable eye trackers. That technology could be built into XR headsets or interactive displays to let people interact with them and engage more with what's on offer.