Vinegar (usually diluted, but can often be used at full strength if needed) works for a lot of things (hard water related stuff especially).
Hydrogen peroxide works on some things you would use things like "oxyclean" on. (Work really well on blood.)
Alcohol works really well on ink. (Alcohol also disinfects.)
I use a 3M magic cloth and water for almost everything but the bathroom. (Even there I could probably use it for everything but the toilet.)
Has anybody ever tried the steamer things? I'll have to admit the TV commercials get my interest . . . .
I know lots of people have better recipes than me so I'll stop now
Good luck!