OnePageRules has a fleet game called Warfleets: FTL. I like it.
https://onepagerules.com/portfolio/warfleets-ftl/
It's free and model agnostic, with both a generic fleet list and some faction-Specific ones, with the added benefit that the Faction-Specific lists can also use ships from the generic list. You take a basic ship profile of three different sizes and plug your own choice of weapons/equipment into them for free (upgrades amount depends on size), with the addition of ship titles and crew "Heroes" which are added as points increases.
You can either play with the free rules/lists, or pay a little (5 bucks) for the full rules, which add more things like campaign games, or optional rules to make the game play different. Essentially making the base game play more like old-school Battlefleet Gothic, or Star Wars Armada, or Dropfleet Commander.
In a nutshell, it's an old-styled fleet combat game, where each player has a fleet of assorted ships, and you maneuver and plug away at each other among various space terrain elements. I am probably going to use it with all my Star Wars Armada models for a more rules-lite experience.