Welcome to the Guild Gnarshm! You could create a map like either of those using either a vector program such as Illustrator or Inkscape, or a raster program such as Photoshop or GIMP. I'm much more familiar with GIMP than any of the other programs and can direct you to a great tutorial for creating old school dungeon maps using it here. You will have to adapt it slightly to suit your purposes, but it's fairly straight forward. Once you get started, throw up a WIP in the "Dungeon Maps" sub-forum and you'll be sure to receive constructive criticism, tips and advice to help you hone your skills.