OpenPiv is a effort of scientists to deliver a tool for the analysis of PIV images using state-of-the-art algorithms. Openpiv is released under the GPL Licence, which means that the source code is freely available for users to study, copy, modify and improve. Because of its permissive licence, you are welcome to download and try OpenPiv for whatever need you may have. Furthermore, you are encouraged to contribute to OpenPiv, with code, suggestions and critics.
OpenPiv exists in three forms: Matlab, C++ and Python. This is the home page of the Python implementation.