Dungeondraft [portable] Link

Designed specifically for creating tactical battlemaps for games like Dungeons & Dragons , Pathfinder , and other TTRPGs, Dungeondraft strips away the complexity of professional art software. You don’t need to be a digital illustrator to create immersive caves, taverns, crypts, or city streets.

The days of drawing individual lines for walls are over. Dungeondraft uses a "snap-to-grid" system where you draw the shape of a room, and the software automatically generates the walls, shadows, and floor textures. dungeondraft

Dungeondraft is not trying to be a high-end 3D modeling suite, and that is its strength. It is a and other TTRPGs