Play the pipe organ and make music, with GrandOrgue simulator
GrandOrgue is a free program that simulates a pipe organ letting you play and practice or compose music for organ. The program is free for personal and commercial use.
The program features a pleasant enough interface, convenient and powerful. Effects, preset profiles and pedal configurations are included and will make your life easier.
Beyond that you will find all the necessary adjustments to produce the sound you search for.