One part of the Energia system which currently is still in service are the Zenit strap-on boosters. They form the basis of the Boeing SeaLaunch satellite launch system.
The Zenit's single, four-nozzle engine is the RD-170, and has more thrust than the single chamber Saturn V F-1 engine. When 'chopped in half,' the RD-170 becomes the RD-180, now the main engine for Lockheed's brand new Atlas V EELV (Evolved Expendable launch Vehicle.).
The picture below illustrates in basic terms the Zenitís relationship to Energia and the SeaLaunch Venture. The coverings on the Buran version are the casings for itís parachute recovery system, which obviously isnít used on SeaLaunch.