  The GENFIT toolkit, initially developed at the Technische Universitaet
Muenchen, has been extended and modified to be more general and user-friendly.
The new GENFIT, called GENFIT2, provides track representation, track-fitting
algorithms and graphic visualization of tracks and detectors, and it can be
used for any experiment that determines parameters of charged particle
trajectories from spacial coordinate measurements. Based on general Kalman
filter routines, it can perform extrapolations of track parameters and
covariance matrices. It also provides interfaces to Millepede II for alignment
purposes, and RAVE for the vertex finder. Results of an implementation of
GENFIT2 in basf2 and PandaRoot software frameworks are presented here.
