s&box libraries list

Better IK

notpointless.chomnr_better_ik

Runtime IK for s&box: two-bone limbs, look-at, foot placement, and FABRIK chains

sbox.game

About

Runtime IK for s&box. Drop a component on the end bone of any rigged model (hand, foot, head, tail) and it works: no per-model setup files, no bone-name markup, no assumed axis convention.

TwoBoneIK - arm/leg IK with pole vector control.
LookAtIK - single-bone look-at (head/eye aim), clamped to a maximum angle.
FootPlacementIK - ground conformance (foot planting + pelvis drop) on top of TwoBoneIK.
FabrikIK - unconstrained variable-length chain IK (tails, tentacles, ropes).

See the wiki for setup and usage.

Does it work? Maybe, maybe not.