The Soviets had the RRAB-3 which they used against the Finns in '39, which seems to precede German use.
en.wikipedia.org
They also had the PTAB, 2.5 kg HEAT bomblets that were dropped in bulk from IL-2 bomb bays, though mainly from '43.
en.wikipedia.org
The LW & RAF also used a two pass system, dropping standard HE bombs to de-roof buildings with the following aircraft dropping small incendiary bomblets, a bit like the RRAB-3.