Nile is a language built by Dan Amelang, a researcher @ viewpoints research institute. It is a language made for graphics rendering, it has the goal of having no incidental complexity.

2D vector graphics rendering as an example, takes ~10.000 lines of code using traditional libraries like Cairo (used by Firefox) or Skia (used by Android and Chrome). In Nile, it's 200 lines of code.

Check out this repo, and the pdf inside the readme https://github.com/damelang/nile

It was also built with OMeta:

http://www.tinlizzie.org/ometa/

https://en.wikipedia.org/wiki/OMeta

That tool can be used to solve a lot more problems. REBOL/Red and Racket are also taking DSL approach.