Data Analysis and HEP Computing: Software, Main use
ROOT: Main HEP data analysis framework
Rivet: Validation and comparison of Monte Carlo event generators
Delphes: Fast detector simulation
FastJet: Jet clustering
HepMC: Event record format
LHAPDF: Parton distribution functions
RooFit / RooStats: Statistical modeling and fitting
pyhf: Statistical inference for HEP likelihoods
Coffea: Python-based columnar HEP analysis
Uproot: Reading ROOT files in Python
Awkward Array: Columnar analysis of complex event data