Physiological noise correction

There are a number of toolboxes available implementing variants of RETROICOR to correct for physiological noise using physiological recordings (respiratory, cardiac, ...):

TAPAS PhysIO Toolbox - integrated with SPM Batch Editor
PhLEM Toolbox, see also 1
DRIFTER Toolbox - actually not RETROICOR, but a nonlinear Bayesian model of physiological noise
3dretroicor
See also some direct implementations of the RETROICOR algorithm in MATLAB:
- http://cbi.nyu.edu/software/
- https://github.com/neurodebian/freesurfer/blob/master/fsfast/toolbox/fast_retroicor.m

References:

SPM/Physio

Physiological noise correction