swissd is an After Effects CS4+ script for creating fixed width text. You can just have fun with the buzz generator and skip thru your fonts or do some serious work with it. Create textlines with the same width. It uses the scale property of the textlayers to resize them to fit in the same width.
Read more here --> fabiantheblind.github.com/swissd-for-ae/
and get it here --> aescripts.com/swissd