FreeHEP  
   Software and information about software which is useful in high energy physics and related fields.
   http://heplibw3.slac.stanford.edu/FIND/FHMAIN.html

HEPpc  
   Linux resources for high energy physics, includes low traffic mailing list.
   http://heppcl.ph.qmw.ac.uk/HEPpc/

FeynArts  
   Mathematica package for generation and visualization of Feynman diagrams and amplitudes.
   http://www.feynarts.de/

Monte Carlo Number Scheme  
   MC particle numbering convention, endorsed by the Particle Data Group.
   http://pdg.lbl.gov/mc_particle_id_contents.html

Software and Tools  
   List at HEPIC.
   http://www.hep.net/resources/software.html

The CalcHEP and CompHEP Projects  
   Two Tools designed to calculate cross sections in high energy physics.
   http://www.ifh.de/~pukhov/

Phi (Phenomenology of Hadronic Interactions)  
   Extension of the Mathematica packages, FeynCalc and FeynArts.
   http://www.feyncalc.org/phi/

FeynCalc  
   Mathematica package for algebraic calculations in elementary particle physics, focusing on Feynman diagram calculations.
   http://www.feyncalc.org/

The ROOT System  
   An object oriented framework for large scale data analysis. ROOT is a C++ replacement of the popular PAW program developed at CERN.
   http://root.cern.ch/

cfortran.h - Interfacing C/C++ and FORTRAN  
   cfortran.h is a single header file that allows you to easily use fortran code in c and c++. Very useful for using HBOOK and other CERNLIB code in new c++ applications.
   http://www-zeus.desy.de/~burow/cfortran/

Texsis - TeX Macros for Physicists  
   This package provides a number of useful features for typesetting research papers. It is an extension to Plain Tex.
   http://www.texsis.org/

FLUKA (Fluktuierende Kaskade)  
   A stand-alone particle physics Monte-Carlo simulation package. It is being used as a simulation tool in a number of experiments.
   http://www.fluka.org

CERN Computing Documentation  
   Provides CERNLIB documentation. Also provides tutorials, FAQs, newsletters and reference cards for a wide range of software.
   http://consult.cern.ch/service/documentation/

Fermitools  
   The Fermilab Software Tools Program (Fermitools) aims to provide useful tools to the community. A wide range of tools are available, and all are free.
   http://fermitools.fnal.gov/

PYTHIA (and JETSET)  
   An event generator for a large number of physics processes. The site contains the latest source, the official manual and a short write-up describing PYTHIA's status with respect to the physics.
   http://www.thep.lu.se/~torbjorn/Pythia.html

Pandora  
   A physics event generator for linear collider studies. It includes beamstrahlung, initial state radiation, hadronization, and full treatment of polarization effects.
   http://www-sldnt.slac.stanford.edu/nld/new/Docs/Generators/PANDORA.htm

HERWIG  
   A Monte Carlo package for simulating hadron emission reactions with interfering gluons. Also contains a list of some "competitor" generators.
   http://hepwww.rl.ac.uk/theory/seymour/herwig/

FeynDiagram.com  
   Free C++ library for drawing Feynman diagrams. The output is in PostScript, which can be used in TeX or printed directly.
   http://feyndiagram.com/

StdHep  
   Provides a common output format for Monte Carlo events so that event generators and other simulators can easily be compared. It also provides a set of routines which convert Herwig, Jetset, Isajet, or QQ events to and from the standard HEP event format.
   http://www-cpd.fnal.gov/psm/stdhep/

Povama  
   Persint OpenGL Visualization for ATLAS Muon Analysis. Software used to visualize the reconstruction of muon traces.
   http://povama.sourceforge.net

AcerMC Monte Carlo Generator  
   The AcerMC Monte-Carlo event generator is dedicated for generation of the Standard Model background processes in pp collisions at the LHC.
   http://borut.home.cern.ch/borut/

Feynmf  
   Drawing Feynman diagrams with LaTeX and Metafont.
   http://wwwasdoc.web.cern.ch/wwwasdoc/WWW/feynmf.html

Elementary Particles Simulation  
   Elementary Particles Simulation using Java Technology.An application made for educational purposes.
   http://mikeathan.tripod.com

JaxoDraw  
   A Java program for the interactive drawing of Feynman diagrams
   http://altair.ific.uv.es/~JaxoDraw/