I don't see any identifying marks to tell the manufacturer but the card with the chip labeled "HD6845R" is almost certainly an 80 column video card. It's a different layout from my Videx Videoterm but it has essentially the same components. Likewise I see no useful identifying marks on the other card but since it has a Z-80 CPU on it it's undoubtedly for running CP/M. It looks suspiciously like the Unitron Z80 card here, but I also see poking around that what looks like the same card was sold under other names with different silkscreens. So maybe it's a "Wacky Bob's House Of Computers Z-80-o-tronic" house brand.
(There's also a directory for 80 column cards on the same site, you can probably match your card there.)
The last dingus, the Sup-R-Mod, is an RF Modulator for hooking up to a TV on channel 33 UHF instead of a composite monitor. Guessing you probably don't need that.
So what happens when you boot a plain old DOS 3.3 MASTER disk from cold? The first thing that should come up on the screen if the system is working is a message telling you it's loading Integer basic into the language card. I'm sort of wondering if maybe the language card has some issue that's preventing it from being detected? (In which case your system is acting like an-Applesoft-only 48k Plus?)