(note this is an incomplete Site and needs improvement)
This vendor is occasionally explicitly Linux friendly, though most support has been written without their input and we cannot count on their help in resolving problems. Most of their cards are well supported under Linux.
AverMedia's bttv cards are well supported and work out of the box. See Bttv devices (bt848, bt878).
Several of AverMedia's saa713x cards are also well supported. See Saa713x devices.