Volleyball and handball also.
I start with volleyball:
Russia holds most titles, and also old USSR, Yugoslavia and Czechoslovakia kicked ass, but also Poland, Serbia and Bulgaria both historically now now. Look at number of medals for both male and female teams.
Handball is maybe little bit less strong, but look:
For men are historical USSR, Yugoslavia and Czechoslovakia strong, also Russia, Croatia, Czechia, Serbia and Poland for me in terms of medals won, while for women, Russia, Czechia and Serbia are strong with medal standings.