HJets is a tool for calculating electroweak cross sections for Higgs plus up to three jets at NLO in QCD.
It is the code behind Phys.Rev.Lett. 111 (2013) 211802, and is available here .
HJets builds on Herwig (Matchbox) and also utilizes the libraries ColorFull, ThePEG (via Herwig)
and OneLOop. It is written by Francisco Campanario, Terrance Figy, Simon Plätzer and Malin Sjödahl.