Throwing Knives/Shuriken (page 424 of the Core Rule Book of SR5)
Acc: Physical Limit, Damage: (STR + 1)P, AP -1, Availability 4R, Cost: 25 nuyen
Grenades (Flashbangs, High Explosive, Fragmentation, Smoke, Thermal Smoke, Gas) (page 434 of the Core Rule Book of SR5)
Variable
Boomerang (page 24 of Run & Gun)
Acc: Physical -1, Damage: (STR + 2)P, AP --, Availability 4, Cost: 50 nuyen
Hapoon/Javelin (page 25 of Run & Gun)
Acc: Physical Limit, Damage: (STR + 3)P, AP -1, Availability 6, Cost: 125 nuyen
Urban Tribe Tomahawk (page 25 of Run & Gun)
Acc: Physical +1, Damage (STR + 2)P, AP -1, Availability 4, Cost: 200 nuyen
Those are about the only throwing weapons available.