- Hutton & Meijer, _[Monadic Parser Combinators](https://github.com/stephan-tolksdorf/fparsec)_ The original paper on monadic parser combinators. - Leijen & Meijer, _[Parsec: Direct Style Monadic Parser Combinators For The Real World](https://www.microsoft.com/en-us/research/wp-content/uploads/2016/02/parsec-paper-letter.pdf)_ Describes Parsec, a monadic parser combinator library that limits backtracking by default and adds better error messages. - [Megaparsec](https://hackage.haskell.org/package/megaparsec) Improved fork of Megaparsec. - [FParsec](https://github.com/stephan-tolksdorf/fparsec) Parsec implementation in F#. - [Sprache](https://github.com/sprache/Sprache) Parsec implementation in C#.