Flexc++ is a tool for generating scanners based on regular expressions. Flexc++ is highly comparable to the programs flex and flex++. The goal was to create a similar program, but to implement it completely in C++. Most flex and flex++ grammars should be usable with flexc++ with minor adjustments.
Piglet is a tool for parsing and lexing text for the .NET framework. The purpose of Piglet is to provide an easy-to-use tool for parsing text which can be easily included in any .NET project as a single assembly. In contrast to most parser generators, Piglet provides a fluent interface which enables you to express your grammar in a syntax which is accessible for users with no prior experience of parser generators. Piglet generates efficient, type safe, and reentrant LALR(1) parsers at runtime, which saves you from having a pre-compile step to generate your parsing tables. It also includes a lexical scanner generator which can be used independently of the parser generator.