Haskellers: I run a website for testing regular expressions and just added support for Haskell and wanted to see if you find it useful/what you think/if you have any suggestions. The site is RegexPlanet, the Haskell testing page is at: http://www.regexplanet.com/advanced/haskell/index.html It uses Text.Regex.TDFA flavor. You can see the source code on github: https://github.com/fileformat/regexplanet-haskell Disclaimer: I'm not a Haskell expert (actually, not even a newbie) and had someone else do the actual coding. Again, any feedback is appreciated. Thanks! Enjoy! Andrew