Complex sentence: De Icaza and Nat Friedman founded Helix Code (later Ximian) in 1999 in Massachusetts; this company developed GNOME's infrastructure and applications, and in 2003 was purchased by Novell.
Split into simpler sentences: De Icaza and Nat Friedman founded Helix Code (later Ximian) in 1999 in Massachusetts. The company developed GNOME's infrastructure and applications, and in 2003 was purchased by Novell.