What should you learn first, Lisp or Haskell? It depends entirely on your personality. One thing is certain - if you want to be a great developer eventually you'll have to learn both.
citeproc-hs is a library for automatically formatting bibliographic reference citations into a variety of styles using a macro language called Citation Style Language (CSL).
The process of writing large parallel programs is complicated by the need to specify both the parallel behaviour of the program and the algorithm that is to be used to compute its result.
A. de Buitléir, M. Daly, M. Russell, and D. Heffernan. Trends in Functional Programming: 15th International
Symposium, TFP 2014, Soesterberg, The Netherlands, May
26-28, 2014. Revised Selected Papers, volume 8843 of Lecture Notes in Computer Science, Springer International Publishing, (2015)
E. de Vries, and A. Löh. Proceedings of the 10th ACM SIGPLAN workshop on Generic programming - WGP '14, page 83--94. New York, NY, USA, ACM Press, (2014)
K. Stengel, F. Schmaus, and R. Kapitza. Proceedings of the 12th International Workshop on Adaptive and Reflective Middleware, New York, NY, USA, Association for Computing Machinery, (2013)
R. Hinze, N. Wu, and J. Gibbons. Proceedings of the 18th ACM SIGPLAN International Conference on Functional Programming, page 209--220. New York, NY, USA, ACM, (2013)