A bunch of different ones for all levels of power generation.  Russia and China are already operating production plants based on Thorium but are not part of the multi-country working group.   http://www.world-nuclear.org/information-library/nuclear-fuel-cycle/nuclear-power-reactors/generation-iv-nuclear-reactors.aspx

Solar/wind experiments will, unfortunately die a slow, politically-correct life 'fueled' by well-meaning but misinformed enviros and "greenies."