Braganças: in Portugal, then in Brazil
Habsburgs: also in Mexico (briefly)
Savoys: in Spain via the cadet branch of Aosta who was also titular king of Croatia.
Coburgs: you forgot the UK; the Coburgs could have reigned in Spain too, but both D.Fernando II and D.Luis refused the spanish crown.
Wittelsbachs: In Greece; earlier a cadet branch had reigned in Sweden.
The discussion below reminds me to ask about the various dynasties which established these:
Habsburgs: first Spain (through Philip of Burgundy), then back to Austria (through Ferdinand, his younger son), then Austria-Este (Modena); later Tuscany
Bourbons: first Spain (through Philippe, Duke of Anjou), then Parma; later Two Sicilies
Coburgs: first Portugal; later Belgium and Bulgaria
Glücksburg: first Greece, then Norway
Can anybody expand on this?