A number of universities and organizations provide access to free business case studies. Below are some of the best known sources.
Acadia Institute of Case Studies (archived link)The Acadia Institute of Case Studies is a non-profit centre in the School of Business Administration, Acadia University. The Institute's focus is on entrepreneurship and small business operations.
Arthur Andersen Case Studies in Business Ethics (Carnegie Mellon)From 1987-1994, Arthur Andersen funded a $5 million joint project with 525 universities to raise awareness of business ethics. This collection of 90 case studies is one product of that effort. All participating universities (includes BU) have license to use these materials and reproduce them as needed for instructional purposes.
Case CentreCase Centre offers a wide range of free cases produced by many prominent schools and organizations across the globe. You must be registered and logged into the website to access free cases. Once logged in, you can use "show only items in the free case collection" tick box in the product search to search all free cases.
Copenhagen Business School Case Studies (Case Centre)Cases focus on responsible management, social responsibility, anti-corruption, and sustainability. With responsible management as a common theme, cases address a number of interdisciplinary subjects, making them suitable for a wide range of business courses. New free cases are added regularly.
Eforce Case Studies (Case Centre)Free case collection that includes 18 innovative teaching cases on technology entrepreneurship. The cases all have accompanying teaching notes and many have media support items, details of which are displayed in product search.
LearningEdge at MIT SloanCollection of teaching case studies developed by MIT Sloan faculty and students. May be downloaded, copied, distributed free of charge by anyone through creative commons license. Topics include entrepreneurship, leadership and ethics, operations management, strategy, sustainability, and system dynamics.
oikos International CasesCurrently consists of over 80 peer-reviewed cases on sustainability in management and entrepreneurship.
SSRN: Darden Case CollectionMore than 4,000 cases from Darden Business Publishing. Many are available for free, but some need to be purchased.
SSRN: Management Educator: Courses, Cases & Teaching eJournal"Promotes innovative approaches to curricular development, course content and delivery systems, student learning, and other educational issues that are important to management faculty to meet the growing demand for discussions, research and analysis on teaching management."