Actually, Rustici did not invent SCORM. They did, however, spearhead the development of later versions (such as xAPI ‘Tin Can’) as part of a US Dept. of Defense Advanced Distributed Learning Initiative resulting from Executive Order 13111. The original SCORM (1.0) was around before Rustici Software existed. I do agree that they are experts.
Anywho, the whole idea of SCORM is compatibility between authored content and Learning Management System, therefore ANY LMS that is SCORM compatible will work.
Amanda presented great info that will give a good starting point in the hunt for the LMS that best suits your needs.
By the way, if any developers are interested, there is a Broad Agency Announcement out right now for white papers that closes May 18, 2018.