One thing? Okay, here goes...
Expansion Packs
Get to Work: Ticket machine
Get Together: Dance Hall/Studio venue with multiple style dance competitions/classes
City Living: Build our own apartment complex with an open common area (also buildable) for all residents
Cats & Dogs: Pet Grooming career/business
Seasons: Snow sledding
Get Famous: Musician career with more band instruments
Island Living: More boat types that allow more than one Sim to board. Ex: Pontoon
Game Packs
Outdoor Retreat: Canvas Outfitter tents or Tipis in different sizes with the ability to add objects and see/live inside
Spa Day: Nail Technician/Manicurist
Dine Out: More restaurant styles including fast food, buffet/smorgasbord, food truck that don't require a host/hostess or waiters/waitresses
Vampires: Limited Vampire abilities taught by Vampire parents starting with children instead of full abilities automatically starting with teens
Parenthood: Carryable, interactive stuffed animals/dolls for toddlers/children
Jungle Adventure: Monkeys
StrangerVille: Vines that appear in plumbing are contagious (for a limited time) if you don't clean them out wearing the Hazmat suit
Stuff Packs
Perfect Patio Stuff: In ground hot tubs
Cool Kitchen Stuff: Juicer
Backyard Stuff: Small telescopes
Vintage Glamour Stuff: Fancy candy dish with chocolates or mints
Bowling Night Stuff: Air Hockey table
Kids Room Stuff: Bunkbed
Toddler Stuff: Toddler Swing
Laundry Day Stuff: Used/Grungier looking washer/dryer