Kinetics Toolkit (ktk) is a pure-python biomechanical library developed by Professor Félix Chénier at Université du Québec à Montréal, Canada. It is a package of integrated classes and functions that aims to facilitate research in biomechanics using python. It does not attempt to provide a complete workflow from raw files to final analysis (although it may in a far future), or a main graphical user interface, or magical blackboxes that process everything automatically.
Kinetics Toolkit is mainly addressed to researchers and students in biomechanics with a little background in programming, who may or may not already have a working workflow and who want to understand and control their data. This is why special attention is made to API documentation and tutorials, and to maximize the interoperability of ktk with other environments (using Pandas Dataframes as intermediate data containers).