1)   BellCommander 1.01
BellCommander is a powerful scheduler which plays audio to PC speakers, PA systems, or to network audio devices. BellCommander is a great low cost replacement for school bells, intercom systems, store audio, and multi-room audio systems.
school bells, audio scheduler, intercom system, automation, intercom, bell, bell sytem, education, educational, school,

 2)   BellWiz 1.10
BellWiz is an innovative scheduling program which plays audio files for a public address system through a PC. The program is ideally created for playing school bells, fire drill sounds, and factory shift change sounds.
school bells, factory, fire drill, sound player, sound script,

 3)   SchoolBell 3.3
SchoolBell plays sounds at specified times. It can be used to control the sound system of a school or factory break bells.
school, bell, timer, timers, schedule, scheduling, clock, belltimer, school bell timer, school bell system,