DashHawk by MSD

[Figjam74]

Similar to the Scangauge for 300 bucks, with a few additional (and handy) features.
DashHawk Vehicle Information Display

I didn't see anything about it here, so thought I'd add it in for comment.

[thebrad]

Pretty much more of the same, but I like that it is capable of displaying up to six different items at a given time.

[SVOboy]

Sweet, another thing to add to the list.

[PaleMelanesian]

Looks like it's CAN-bus only. Generally 2004+ vehicles. Cool looking thing. I wonder, does it handle EOC?