MP3
The first player for the MP3 format was designed by the same Fraunhofer Institute in 1990's. A Croatian student named Tomislav Uzelac developed AMP MP3 Playback Engine in 1997. After the player appeared on the Internet, two students named Justin Frankel and Dmitry Boldyrev transformed it into Winamp. They took the engine of the original player and added the interface of the famous Windows.