I used to hike to a mountain lake in New Hampshire for trout fishing. On the wall of the Adirondack shelter next to the lake was a large cast iron skillet. Random people used it for decades to cook fish over a wood campfire. The only cleaning it got was being scraped with a flat rock, rinsed in the lake, and pick at by woodland critters. It always worked just fine, and the fish tasted great.
Also lotide, if you’re into a minimalist text-only interface.
For a FOSS but not federated option there’s Discuit.