Pretty neat. It's a nice collection and they seem very aimed at classical roguelike development, so I enjoyed that.
I wasn't able to find the GitHub, but are they written in JavaScript? I ask because I thought they might be even more useful as learning material and JavaScript is a very readable language that's easy to convert to other languages.
I also think they might be more useful as functions apposed to stand alone tools, though I do like how you can check them out online as stand alone tools.
For example, converting the dungeon generator to a single function like:
int[] GenerateDungeon( int size_x, int size_y, int density )
Or the Name Generator as:
string[] GenerateName( string[] prefix_list, string[] root_list, string[] suffix_list, int quantity )
(sorry about the weird pseudo-code format... tried to make it like JavaScript, but I haven't touched it in years)
Other than that, I think the map generators need a bit of work, but map generators are always a process of tinkering, so I'm sure you'll refine them over time. I'd actually be interested in seeing the different methods of pattern generation used in your map generator mixed with your Color Palette generation code as some sort of procedural texture generation, but that's just an idea.
Good stuff so far, I hope that you keep expanding on them and experimenting :)