Rubber Curry Comb
Mane Comb (thick prongs with large spaces between them, or a plastic curry comb would work. Avoid the metal ones with wooden handles - the comb part always falls out when you hit a knot!!)
Hoof Pick (I like the plain metal ones - I never use the brush par)
Sponges - 1 for eyes and nostrils, 1 for under the tail
Rubber Curry Mitt (I love using this all over the horse!!)
Small Body Brush (for the face)
I used to use hoof dressing but a healthy diet should take care of the hoof. My grooming tote also has a thermometer (on a string - you don't want it getting sucked in!), stethoscope, note pad and pen, a small scrub brush for cleaning buckets, and a rag. These are things I don't *have* to have or use, but I tend to use them on a fairly regular basis.
I don't use sprays, conditioners, cleaners, etc. unless there's a very specific need for it.