pfff is a set of tools and APIs to perform some static analysis (e.g. to find bugs), dynamic analysis, source code indexing, code search, code visualizations, code navigations, or style-preserving source-to-source transformations such as refactorings on source code. There is good support for C, Java, PHP, JavaScript, HTML, CSS, and preliminary support for C++, Rust, C#, Erlang, Lisp, Scheme, Haskell, Python, OPA, Sql, and even TeX. There is also very good support for OCaml and noweb (literate programming) so that pfff can be used on the code of pfff itself.