In addition to those mentioned before, I find https://dungeonmapdoodler.com/ is pretty good or the free tier of inkarnate. Source: about 1 year ago

I've been working on a dungeon map making tool for a while as well. It was originally intended for whipping up a really quick map, but it's expanded a fair bit since then, and I'm currently working on adding tools for world maps as well. Check it out here if you're interested! https://dungeonmapdoodler.com/. - Source: Hacker News / about 1 year ago

Dungeon Map Doodler is a pretty easy one to pick up, if a bit bare-bones. It's free though so who can complain. Source: about 1 year ago

There are mapping softwares out there which can do the drawing for you if that's what you need. Source: over 1 year ago

I use Dungeon Map Doodler to create maps, then get them printed as blueprints at Staples, Office Depot, or a similar location that has a plotter. I then use sheets of black cardboard paper to cover areas the PCs haven’t been to yet, and uncover them as appropriate. Source: over 1 year ago

AutoREALM (link) is similar to Campaign Cartographer and some others. But I highly recommend bumping to Wonderdraft once you're able to do so. Source: over 2 years ago

Autorealm - An old but moderately capable map maker. Free with a lot of tutorials. Much more on the CAD side of things than something like Wonderdraft. Source: about 3 years ago