BIDS
MEG and EEG data
NatMEG provide a complete pipeline for pre-processing MEG and EEG data including conversion to BIDS format. See details on the NatMEG pipeline page.
MRI data
MRC provide a pipeline for the standard CIR-protocol that you can find here and a singularity container for running heudiconv to convert DICOM data to BIDS format.
PET
BMIC provide tools for file conversion and BIDS organization of PET data. See details here. In addition, there are several Bids-apps available for PET data processing and analysis.