I still remember the excitement when the first Cakewalk Sequencer for Windows came out. It was the first time that people without Amigas (but with cash or amigos) could do real professional-quality sequencing.
Cakewalk has grown far beyond their roots in sequencing, and is dominant in the music industry. It turns out that the current Cakewalk CTO was a customer of the first sequencer as well -- he sat down with Charles Torre to talk about the 64-bit version of Cakewalk Sonar. Check out the interview: