The free online courses don't require students to enroll or register, but they also don't typically award any college credit.

Free Online Non-Credited Sales and Marketing Management Courses

Kutztown University of Pennsylvania

Identifying Your Sales Strategy
Massachusetts Institute of Technology

Data Mining
Marketing Management
Marketing Strategy

The Open University

Marketing Communications as a Strategic Function
The Market-Led Organisation
Social Marketing

SmallBizU

Marketing 101: The Fundamentals
Positioning Master Class

University of California - Irvine

The Elevator Pitch