| [Bison](http://www.gnu.org/software/bison) | Bison is a general-purpose parser generator that converts an annotated context-free grammar into a deterministic LR or generalized LR (GLR) parser employing LALR(1) parser tables. |
| [flex](http://flex.sourceforge.net/) | Flex (Fast Lexical Analyzer) is a tool for generating scanners. A scanner, sometimes called a tokenizer, is a program which recognizes lexical patterns in text. |
| [Python](http://python.org/) | Python is a programming language that lets you work more quickly and integrate your systems more effectively. |
| [Tcl](http://www.tcl.tk/) | Tcl (Tool Command Language) is a very powerful but easy to learn dynamic programming language, suitable for a very wide range of uses, including web and desktop applications, networking, administration, testing and many more. |
