From the novelization, these are the Imperial projects listed by Jyn (emphasis mine):
She spoke sternly, demanding Cassian's attention as she read from the screen. "Project code names: Stellarsphere. Mark Omega. Pax Aurora..." Were all of them weapons like the Death Star, designed for terror and genocide? Had her father known about the others? She couldn't afford to think about it — there were too many horrors down that road. "War-Mantle. Cluster-Prism. Black-Saber."
Rogue One: A Star Wars Story - Official Novelization Chapter 19
Despite some superficial naming similarities, to my knowledge there's been no confirmed link between any of these projects and any existing (canon or legends) property. The prequel novel Catalyst implies that at least a few of them are actually subcomponents of the Death Star itself:
The Imperial Energy Division was new, but it, too, operated under the umbrella of Project Celestial Power. In fact, each separate department of the battle station project had its own cover name and cover agency, and Galen wasn't alone in working for a counterfeit division and having his research put to alternative uses. Scattered across the galaxy were teams of scientists working on conventional weaponry, tractor beam and hyperdrive technology, even hull cladding systems. Each project was concealed behind names like Stellar Sphere, Mark Omega, and Pax Aurora. But all those paled in comparison with research on the superlaser.
Catalyst: A Rogue One Novel Chapter 19: "Closed Interval"