Dungeon Scrawl is a neat, browser based dungeon map editor that produces maps with Dyson Logos style hatching:
https://dungeonscrawl.com/I started Dungeon Scrawl on May 8th when I was just playing around with generating grids and hatching, and thanks to amazing support from my Patrons I’m able to release the open beta completely for free, with no paywall, no ads, and no locked features.