What I'm after is a software Mars atlas that shows me (with labels) surface feature visible with an amateur telescope. I don't want something that can only be used on line. Mars Previewer II is okay as far as it goes, but I was looking for something a bit more sophisticated.
The Mars section of Deepsky software looks something like what I'm after,
http://www.deepsky2000.com/screen/Mars.jpg , but I'm loathed to buy the whole program just for this.
Has anyone got any ideas?