ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files. It's widely used to build languages, tools, and frameworks. From a grammar, ANTLR generates a parser that can build and walk parse trees.

pycparser is a parser for the C language, written in pure Python. It is a module designed to be easily integrated into applications that need to parse C source code.

Python script to parse bookmarks exported from ffox in JSON format in the html format used by emacs-w3m, optionally merging with an existing emacs-w3m bookmark file. Note that nested folders in the fffox bookmarks are flattened, as emacs-w3m bookmark categories are all on one level.

Will cope with the current (Nov 2009) bug in ffox which exports badly formed JSON, but if other parse errors occur run the JSON through a validator.