Here is a list of all namespaces with brief descriptions:

Nanonymous_namespace{change_weights.cxx}
Nanonymous_namespace{jet_met_tools.cc}
Nanonymous_namespace{lepton_tools.cc}
Nbmaker_full_cfg
Ncache
Ncount_entries
Ncount_root_files
Ncrab_cfg_template
Ndas_client
Ndelete_treeglobal
Ndivvy_json
Ngenerate_crab_cfg
Nget_flist
Nget_puweights
Nget_sig_puweights
NLester
Nlink_all_files
Nlink_missing_samples
Nlock_files
Nmake_dataset_table
Nnev_check
Nparameterize_efficiency
Nplot_btagSFs
Nrename_data_eras
Nresubmit
Nresubmit_crab
Nrm_zombies
Nrpv_skim
NRyan_this_needs_a_new_name_remove_originals_that_survived_resubmit
Nsend_change_filter
Nsend_change_weights
Nsend_combine_ntuples
Nsend_merge_glu_stop
Nsend_merge_ntuples
Nsend_sig_change_weights
Nsend_skim_ntuples
Nsend_slim_ntuples
Nsend_split_scan
Nskim_ntuple
Nslim_ntuple
Nstageout
Nsub_cond
Nutilities
Nvalidate_ntuples
Nxsec