IMHO the best mecha technology belongs to the Zone of the Enders. Orbital Frame tech among others (from observation)
include:
Space manipulation - the compressed space (CS) fields, vector trap, CS weapons, etc.
Extreme strength - those who follow ZOE & have played ZOE2 should at least know the hovertrain scene (results in
ability to throw around other mecha like ragdolls to be of near certainty).
Extreme speeds - highest recorded conventional speed (with thrusters) = 400,000 km/h. They can clear Earth gravity
easily = at least requiring 40,000 km/h. And of course, there's always the Zero Shift.
Weapons systems - horrendous firepower, homing energy weapons (definitely not mere lasers), burst mode, use of vector trap to carry entire arsenal of weapons, CS weapons,
etc.
Defensive mechanisms - regenerative self-supporting armor technology (SSA), conventional energy shields, CS shield
(nullify all forms of attack except another CS attack).
Damage regeneration - OFs regenerate damage like living organisms as long as it has sufficient energy and/or
Metatron.
Power generation - OFs use anti-matter reactors (anti-proton) already at high MT/GT level & greatly increases in
power upon receiving certain upgrades (read: Zero Shift program).
Computing technology/interface - OFs use quantum computers and interfaces directly with their runners using the
so-called MindFlow System. Advanced onboard combat AI. Drawback: can cause Metatron poisoning/madness. It is popularly
theorised that onboard AI function as a buffer between the MindFlow System & the runner.
Metamorphic properties: Metatron is metamorphic in nature & OF parts can metamorphose into weapons or appendages or
parts according to the dictates of the runner or AI.