In addition to the basic vinegar, baking soda and Bon Ami cleaners, I like Seventh Generation cleaners. Here's a great deal on Seventh Generation at Target (original post found at MyFrugalAdventures):
Target coupon found here for $1 off Seventh Generation Disinfecting products (this coupon is only printing once, so you'll need additional computers to print more).
Stack the Target coupon with this $1 off manufacturer coupon for a total of $2 off (these coupons are printing twice).
The Seventh Generation cleaning products are reportedly $2.99 at Target, so they'll be 99cents after stacking both coupons.