When you think of creating eLearning, you are thinking of SCORM modules or a full platform. If you are thinking of Scorm creation, I would recommend building on PowerPoint and using an add-in to convert to basic SCORM. If you can afford it though, Articulate and Captivate are spectacular for authoring.
As an alternative, I would also like to invite you to try QuoDeck to create a mobile learning platform. You can use your existing PPTs, PDFs, and Videos to create the content and layer it with quizzes and games without requiring a separate authoring tool. Give it a spin and see if it works for you…