Below are some other abilities that increase the power of moves by 50% (essentially the equivalent of STAB):
Steely Spirit = Steel (Perrserker)
Steelworker = Steel (Dhelmise)
Dragon's Maw = Dragon (Regidrago)
Transistor = Electric (Regieleki)
Rocky Payload = Rock (Bombirdier) w/Rock-Tera
Toxic Boost = Phys. Moves [Normal] (Zangoose)
Flare Boost = Spec. Moves [Ghost] (Drifblim line)
Technician = 60bp moves or weaker [various] (various)
Sharpness = "Slicing" Moves [various] (Samurott-H / Veluza / Gallade / Kleavor)
Flash Fire = Fire "if hit by one" (various)