Here is a list of all namespaces with brief descriptions:

[detail level 12345]

KalmanMuonCorrector
keyFinder
KFBasedPixelFitter
KFFittingSmootherForInOut_cfi
KFFittingSmootherForOutIn_cfi
KFSwitching1DUpdatorESProducer_cfi
KFTrajectoryFitterForInOut_cfi
KFTrajectoryFitterForOutIn_cfi
KFTrajectorySmootherForInOut_cfi
KFTrajectorySmootherForOutIn_cfi
KFUpdatorESProducer_cfi
KineDebug3
kinem
kt4CaloJets_cfi
KT4CaloJetsMCFlavour_cff
kt4GenJets_cfi
kt4JetID_cfi
kt4JTA_cff
kt4PFJets_cfi
kt4TrackJets_cfi
KT6CaloJetsMCFlavour_cff
kt6JetID_cfi
KullbackLeiblerTSOSDistance_cfi