I am dabbling in Nim, and plan to replace bash/Python scripts with Nim. So far it looks really promising!
Few projects: nbuild[1], ntangle[2].
I wouldn't say that these are exemplary projects.. but they just show that Nim can replace bash/Python for command line utilities.
[1]: https://github.com/kaushalmodi/nbuild/ [2]: https://github.com/kaushalmodi/ntangle/