Packard Bell used to have these crappy Aztech sound cards with a Rockwell (?) modem on them. Notoriously picky about drivers.
Various companies made video cards which technically had a separate MPEG decoder or AVI Scaler and capture device onboard, though many were PCI. The QuickWorks 24i has an ET4000, a ViPer (Scaler) and capture capabilities, as well as a fused power supply for some external device.
Do ISA SBCs count?
Technically, you could put as many things as you wanted on an ISA card due to the interface being parallel, at least, within the power limitations of the slot.