Source: mpora.com/rock-climbing/abseiling-10-techniques-everyone-should-know/
Fireman Belay
Basic Abseil
Simul Abseil
Tandem Abseil
Counterbalance Abseil
Australian Abseil
Headfirst Abseil
Dülfersitz
Aid Climbing: On prepared routes with aids
Free Solo: On natural/big wall with no harness
Bouldering: Smaller boulders with no harness, protected by crash pads
Trad Climb: All protection will be removed from surface after climb