I use mlterm on FreeBSD. Of course, I have a page about it.
http://www.scottro.net/qnd/qnd-mlterm.html
On Linux I tend to use urxvt. I need the unicode ability, which leaves out mrvxt, a very nice terminal otherwise. Aterm also lacks utf-8, and last time I tried it, didn't have any support for Japanese. Otherwise, it's a nice terminal.