Hello, here I am providing you the details of the free diploma courses available under various universities as under:

Diploma courses you may do in:
Arts & Humanities
Business & Management
Computing & IT
Design
Education, Childhood & Youth
Engineering
Environment & Development
Health & Social Care
Health & Wellbeing
Languages
Law
Mathematics & Statistics
Medical Sciences
Nursing & Healthcare Practice
Psychology & Counselling
Science
Social Sciences
Technology

Courses under various universities:
Advanced Managerial Communication at Massachusetts Institute of Technology
Discovering Management at The Open University
Building and Leading Effective Teams at Massachusetts Institute of Technology
Fundamentals of Business Analysis at University of California - Irvine
Management: Perspective and Practice at The Open University
Introduction to Project Management at University of California - Irvine
Managerial Economics at Utah State University
Managing Projects Through People at The Open University
Managing Transformations in Work, Organizations and Society at Massachusetts Institute of Technology