MandelSpawn was written in 1989, and it has not been actively maintained since 1993. Thanks to Moore's Law, parallel processing is no longer needed to calculate Mandelbrot sets at a decent speed; even in 1997, a single Pentium PC could already calculate Mandelbrots as fast as a dozen of Sun workstations did in 1989.
The most recent version is 0.07pl2 (from August 1997), which is available for HTTP download right here.
The name MandelSpawn is pronounced exactly like the Swedish word "mandelspån", which means "almond flakes".