The Trial Versions of the Angster Organ from Nagyrakos has a limited compass of C2-C3 (048-c to 060-c) in the pedal, C2-G5 (048-c to 079-g) in the manuals. All other functions work.
Free download the Hauptwerk demo sample sets:
Install the package01 and then the package02. It is important to sort.
To download files, Chrome or Firefox browsers as possible. IE browser is not capable of downloading!
The price is only € 25.
I suggest you buy only after trying the demo.