Tutorial: New users should start here.
User Guide: For all the details. Now includes descriptions of SMR, cylindrical coordinates, particles, and SR.
Programmer Guide: A look under the hood.
Method Papers: Refereed journal papers.
Color Palettes in Athena: Color schemes available for .ppm image outputs.
Doxygen documentation for Athena, contributed by Brant Robertson.
Regression Tests: For developers; run them every time a change is made.