http://www.helpdesks.com
has a matrix that lists them by feature and cost.
I recall finding one here for a company and they used it for about 2 years. The grad student that wrote it was very happy to have someone using it and also he made mods for no charge. YMMV.
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I don't care if you are black, white, purple, green, Chinese, Japanese, Korean, hippie, cop, bum, admin, user, English, Irish, French, Catholic, Protestant, Jewish, Buddhist, Muslim, indian, cowboy, tall, short, fat, skinny, emo, punk, mod, rocker, straight, gay, lesbian, jock, nerd, geek, Democrat, Republican, Libertarian, Independent, driver, pedestrian, or bicyclist, either you're an asshole or you're not.
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