Complex sentence: ProTracker is a free and popular tracker created by Lars Hamre, Anders Hamre, Sven Vahsen and Rune Johnsrud for the Amiga platform which is amongst the programs that first allowed for widespread creation of music without studio equipment.
Split into simpler sentences: ProTracker is a popular freeware tracker created by Lars Hamre, Anders Hamre, Sven Vahsen and Rune Johnsrud for the Amiga platform. It is amongst the programs that first allowed for widespread creation of music without studio equipment.