Diaper Wraps -- not as many as you'd think. Unless there's an explosion, you can just use the same ones again and again. We only needed about three in each size. Of course, if you want them to match outfits, it's a different story!
Cloth wipes -- I made my own and if you're doing laundry anyway, they are NO extra work! I made them in different sizes out of regular towel material, and use them for wiping bottoms and noses, and all kinds of other things! Super handy. We have about four dozen, but could get by on half of that.
Baby wash cloths-after a few months I felt comfortable using regular adult wash cloths on the baby, but it was really nice to have a few of those super soft baby terry cloths for that silky newborn skin. We only used a few, though, and had at least a dozen as gifts!
Wipes warmer -- If you do use cloth wipes, I recommend getting some natural gentle baby soap (we use baby bits--ds 18 mos, still working on our first package) I make up the soap a little dilute and put it in a spray bottle by our changing area, and use a little travel squirt bottle for our backpack. I just spray his bottom or the wipe as I use them. It's clean and gentle and easy (I think reg. wipes are irritating on sensitive skin!) and it seems like keeping wipes warm and wet would be a perfect breeding ground for bacteria!
Baby wearing devices --Yes, I use my wrap like crazy for long walks, going to the store, church, socializing, etc, but a nice simple sling is better for around the house, or quicker things
Wearable blanket -- Do you mean a sleep sack? These work fine, but honestly do the exact same thing as a warm sleeper.
There are also swaddling blankets with velcro or ties or other fasteners. We were given some of these, and didn't get as nice of a swaddle from them as from a big receiving blanket. they actually fell off more easily, which would defeat the purpose of the swaddle and make it more sids-risky.
Body products -- soap and shampoo--I found even natural baby soaps and shampoos to be very drying for ds when he was newborn, and water and a washcloth was almost all I needed to clean him.
Now that he's a toddler, however, we definitely use baby shampoo. We have a bar, which we use as soap too for after smeary meals and splashing in puddles, basically all the time.
***baby oil--this is hands-down my indispensable baby product! We put it on his bottom so the meconium didn't stick in the first week, used it for massage from the beginning until now (he asks for it, "'ssage?" and lies down and waits for a nice rub), and it cleaned him much more gently than soap as a newborn (We like Weleda baby oil, or kitchen olive oil) We used oils instead of lotions, which seemed to often be irritating
Diaper cremes: this depends on how you practice diapering. We do ec or change the babe as soon as he is wet and have never had a rash. (using cloth dipes without a cover at home so we know right away) If you have food sensitivity issues, or change at regular times rather than right away, (most of the other moms I know can't beleive how often I changed him) a protective coating is nice.
Baby bath tub -- We loved taking baths with him so much that we returned the baby tub-- when dp or I was in the bath or shower, the other would bring the baby before the water got soapy, and take him away when he was clean. It was such a special, cuddley time, and if we were right with him, the temperature and slipping or being scared of the water wasn't an issue.
Breastfeeding Pillow -- I liked and still use my bf pillow, but wouldn't call it a necessity. It was also nice to just have a supply of comfy pillows all over to help with the awkwardness of early breastfeeding
we also used: a baby fingernail clipper: those nails are so little and sharp! get one that you can hold comfortably. I do not like the kind with the magnifying glass--it made it confusing!
It's so fun getting ready for them to come! Can't wait to set up all our stuff for the new one.
oh, another thing: I think it's really useful to have a beautiful little place for the baby set up in the bathroom. I use a sling all the time, but you really need two hands to get jeans up and down! We lined a wooden box with quilts and had a simple mobile above it-- it was actually a favorite spot of ds's, and goodness knows, a mama does need to be able to pee on a regular basis!