2 IDE controller/Sound card combos (they have RCA jacks only....and one has the Sanyo label on it. Weird)
Those might be CDROM controllers for the old non-ATAPI drives. Each of the manufacturers (Sony, Panasonic, Mitsumi, etc..) had their own style of interface (all similar, but slightly different). The RCA jacks are for passing CD-Audio on to an external amplifier or soundcard Line-In.