Axiom is being reworked to use the Firefox browser as the new front end. Static pages from the new hyperdoc show some of the details. These pages will be "live" in the new Axiom hyperdoc.
A first tutorial is available at: http://www.dcs.st-and.ac.uk/~mnd/documentation/axiom_tutorial/
The Rosetta document is a comparison of nearly equivalent commands between many different computer algebra systems.