  We discuss the possible signatures in the electroweak symmetry breaking
sector by new strong dynamics at future hadron colliders such as the Tevatron
upgrade, the LHC and VLHC, and $e^+e^-$ linear colliders. Examples include a
heavy Higgs-like scalar resonance, a heavy Technicolor-like vector resonance
and pseudo-Goldstone states, non-resonance signatures via enhanced gauge-boson
scattering and fermion compositeness.
