As you are asking about courses offered by Chennai University for Distance Education

Certificate Courses-
Certificate Course (CC) - Computer Applications
Certificate Course (CC) - E-Commerce
Certificate Course (CC) - French
Certificate Course (CC) - German
Certificate Course (CC) - Library and information Science
Certificate Course (CC) - Medicinal Plants
Certificate Course (CC) - Phytochemical Tehcniques
Certificate Course (CC) - Plant Cell and Tissue Culture
Certificate Course (CC) - Police Administration
Certificate Course (CC) - Sanskrit
Certificate Course (CC) - Spoken Tamil
Certificate Course (CC) - Written Tamil

Diploma Courses-
Diploma in Airhostess and Aviation Hospitality (DAAH)
Diploma in Accounting & Auditing
Diploma in French (DF)
Diploma in Functional Arabic
Diploma in German (DG)
Diploma in Labour Law
Diploma in Management
Diploma in Manuscriptology & Editing
Diploma in Police Administration
Diploma in Rain Water Harvesting
Diploma in Sanskrit (DS)
Diploma in School Management
Diploma in Taxation
Diploma in Tourism & Travel Management
Diploma in Yoga

Postgraduate Diploma Courses-
Post Graduate Diploma (PGD) - Computer Science
Post Graduate Diploma (PGD) - Public Relations
Postgraduate Diploma in Remote Infrastructure Management (PGDRIM) - Streams: Networking / UNIX
Postgraduate Diploma in Enterprise Computing (IBM Mainframe) - Streams: IBM Mainframe Application Software / IBM Mainframe System Management / IBM Mainframe Database Administration

Undergraduate Degree Courses-
Bachelor of Arts (BA) - Christian Studies
Bachelor of Arts (BA) - Economics
Bachelor of Arts (BA) - English
Bachelor of Arts (BA) - Historial Studies
Bachelor of Arts (BA) - Music
Bachelor of Arts (BA) - Public Administration
Bachelor of Arts (BA) - Tamil Literature
Bachelor of Arts (BA) - Tamil
Bachelor of Arts (BA) - Urdu
Bachelor of Arts (BA) - Vaishnavism
Bachelor of Business Administration (BBA)
Bachelor of Computer Applications (BCA)
Bachelor of Commerce (BCom) - Bank management
Bachelor of Commerce (BCom) - Co-operation
Bachelor of Commerce (BCom) - Corporate Secretaryship
Bachelor of Commerce (BCom)
Bachelor of Science (BSc) - Geography
Bachelor of Science (BSc) - Mathematics
Bachelor of Science (BSc) - Psychology
Bachelor of Science (BSc) Medical Sociology
Bachelor of Science (BSc) Hotel and Catering Management
Bachelor of Science (BSc) Visual Communication
Bachelor of Science (BSc) Apparel Fashion Design
Bachelor Of Multimedia Animation (BMA)
Bachelor of Naturopathy and Yogic Sciences (BNat)
Bachleor of Music (BMusic)

Postgraduate Degree Courses-
Master of Music (MMusic)
Master of Arts (MA) - Vaishnavism
Master of Arts (MA) - Christian Studies
Master of Arts (MA) - Economics
Master of Arts (MA) - English
Master of Arts (MA) - Historical Studies
Master of Arts (MA) - Human Rights and Duties Education
Master of Arts (MA) - Modern Arabic
Master of Arts (MA) - Political Science
Master of Arts (MA) - Public Administration
Master of Arts (MA) - Sociology
Master of Arts (MA) - Tamil
Master of Arts (MA) - Urdu
Master of Business Administration (MBA)
Master of Computer Applications (MCA)
Master of Library and Information Science (MLISc)
Master of Science (MSc) - Botany
Master of Science (MSc) - Chemistry
Master of Science (MSc) - Information Technology
Master of Science (MSc) - Mathematics
Master of Science (MSc) - Physics
Master of Science (MSc) - Psychology
Master of Science (MSc) - Zoology
Master of Science (MSc) - Geography
Master of Commerce
Master of Library and Information Science

Research / Doctoral-level Courses-
Master of Philosophy (MPhil) - Commerce
Master of Philosophy (MPhil) - Economics
Master of Philosophy (MPhil) - English
Master of Philosophy (MPhil) - History
Master of Philosophy (MPhil) - Political Science
Master of Philosophy (MPhil) - Public Administration
Master of Philosophy (MPhil) - Tamil