The software has been specifically released under the Apache v2 license to ensure it can be used in both academic and commercial projects. The library contains readers and writers of the mzML data format, which has been written using modern C++ techniques and design principles and supports a variety of platforms with native compilers. The tools perform proteomics data analyses the libraries enable rapid tool creation by providing a robust, pluggable development framework that simplifies and unifies data file access, and performs standard proteomics and LCMS dataset computations. Summary: The ProteoWizard software project provides a modular and extensible set of open-source, cross-platform tools and libraries.