  In this proceeding, the xFitter project is presented. xFitter is an
open-source package that provides a framework for the determination of the
parton distribution and fragmentation functions for many different kinds of
analyses in Quantum Chromodynamics. xFitter version 2.2.0 has recently been
released and offers an expanded set of tools and options. xFitter has been used
for a number of analyses performed recently. An emphasis is given on the
recently published study performed by the xFitter Developers' team of the pion
fragmentation functions.
