A graphical tool for designing finite state machines and exporting them to Hardware Description Languages, such as VHDL, AHDL, Verilog, or Ragel/SMC files for C, C++, Objective-C, Java, Python, PHP, Perl, Lua code generation.
TreeDL (Tree Description Language) is a notation for tree structures used by programs (like syntax trees) and tool for translation of tree descriptions to target programming language, docs generation, etc. Tool's functionality can be extended by plugins.