scala-parser-combinators is a library that offers simple combinator-based parsing for Scala. Originally part of the Scala standard library, it allows developers to construct parsers using combinators directly in Scala code.
Chevrotain is a powerful and fast parser-building toolkit for JavaScript. It supports the construction of LL(k) parsers and is suitable for building interpreters, compilers, and DSLs.
Covra is a project to help design compilers. C3 is a tool specialized on the easy design and construction of ASTs, it is independent of the compiler compilers or parser generator that is used. It generates Java and C# code. Require JRE 1.6.0.