For university IT departments, the "index of applications" refers to the LTI 1.3 Advantage standard. If your school uses a Learning Management System (LMS), you can index the following Cengage deep-linking tools:
How to get this index: Log into your school’s LMS as an administrator. Navigate to Admin > Developer Keys > Cengage. You will see a JSON list of endpoints—this is the technical index. index of applications cengage learning
Best for: Microeconomics, Macroeconomics, Management, Marketing. "The topic isn't there
Aplia focuses on critical thinking through scenario-based problems. It was one of the first platforms to offer auto-graded economic graphs. For university IT departments, the "index of applications"
What sets it apart: Aplia problems often require manipulating diagrams (supply/demand curves, production possibility frontiers) directly in the browser.