A Question about Emulators

Hi guys, I come here seeking for your wisdom.

Recently I discovered this. Maximus Arcade, is an incredible frontend for many emulators.

Ever since I saw that, Another question has always been lurking.

Is there any kind of program for catalogue ROMS?

I mean something that checks your ROMS for a particular system, arrange them, check them, give them the proper name and download the cover?

The most important thing is that it download the cover specially for things like this Maximus Arcade, where when I choose the Game it shows me the cover or some image from the game.

Thanks in Advance.

P.S. It can be also and already zipped file with all the images inside.

P.S. 2. I am not looking for roms.