I'm very impressed with the amount and quality of libraries they have released on Github [1].

Going to use the following in my "webmachine in Haskell" project.

  - aeson: Fast json library [2]
  - pronk: load test webservers [3]

[1]: https://github.com/mailrank/ [2]: https://github.com/mailrank/aeson [3]: https://github.com/mailrank/pronk