Watches
Pizza
Lots of musical instruments such as piano and violin
Electronic music
Gold, while it’s unknown when and where exactly gold started to be mined the oldest artifacts found are from Bulgaria.
Democracy

But you will struggle coming up with examples of others countries as well. There are few countries that invented something and are still the best at. So much stuff was just invented so long ago. The only county where this is somewhat easy is the US with some technology.