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.