Solid Hardwood, Engineered and Laminate Flooring - restoring hard wood floors

I have a question regarding restoring oak hard wood floors. Basically, we purchased a house built in 1937. The hard wood floors have been covered with carpetting from day one, at least that's what we've been told. We recently removed the carpets throughout the house and found beautiful hard wood floors that are basically in mint conditions. However, they still look like they need to be revived in some way, if only by cleaning them. My question is, what product would you recomend to clean/polish/restore the wood floors? They really don't look like they need to be sanded and/or restored by a professional. They look really good as is, just needs a little TLC.

Any information would be greatly appreciated.