Also merlin is worth mentioning explicitly. It finds and highlights errors during editing (in emacs, vim and co), does autocompletion, shows types and since rec

Also merlin is worth mentioning explicitly. It finds and highlights errors during editing (in emacs, vim and co), does autocompletion, shows types and since recently can also write pattern matches automatically. http://the-lambda-church.github.io/merlin/destruct.ogv http://the-lambda-church.github.io/merlin/destruct.ogv