  We consider various models realizing baryogenesis during the electroweak
phase transition (EWBG). Our focus is their possible detection in future
collider experiments and possible observation of gravitational waves emitted
during the phase transition. We also discuss the possibility of a non-standard
cosmological history which can facilitate EWBG. We show how acceptable
parameter space can be extended due to such a modification and conclude that
next generation precision experiments such as the ILC will be able to confirm
or falsify many models realizing EWBG. We also show that, in general, collider
searches are a more powerful probe than gravitational wave searches. However,
observation of a deviation from the SM without any hints of gravitational waves
can point to models with modified cosmological history that generically enable
EWBG with weaker phase transition and thus, smaller GW signals.
