http://flowstoners.com/quilcom
Take a listen to or try way more professional plugins made with FlowStone, by visiting Rex at Flowstoners. His Quilcom plugins range from synthesizers to samplers, effects and simulations of various acoustic instruments. Alot of his creations are based on physical modelling. His Flowstoners page also feature other creators plugins as well... Go there, you know you want to!
An example of Rex's plugins. Rank Two, a pipe organ simulator which is a further development of his first Rank plugin...