i think the biggest drawback to “The Font Thing” is that it only handles TrueType fonts — no PostScript.

link, do you mean “typograf” (http://neuber.com/typograph/index.html)? As far as I remember it’s possible to test it for 30 days or so.
On a pc you could also consider ATM or a combination of both (there’s a link at the bottom of the page).