This, I presume, it's the perfect opportunity to promote my own maze generator[1], which incidentally is a Real Application that you can run on your own computer, and the output of which you own!
Like the linked application, it supports triangular, rectangular and hexagonal grids, and different generation algorithms, which can be combined for various areas of the final maze. It also supports background and mask images to colourise rooms and provide a shape for the maze, as well as a small selection of effects to apply. The output format is either SVG or PNG.
And for that extra HN cred, it's written in Rust (which you are free to ignore if you're not into RIIR, but this is in fact a rewrite of an earlier Python project of mine)!