Dr Ledgard's OOP Site
- Contains an introduction to object oriented programming concepts based with examples in C++. Also includes a glossary, interactive quizzes and references.
- http://www.eecs.utoledo.edu/~ledgard/oop/mainpage.html

Object Mentor Inc.
- Provides training to object oriented developers looking to accelerate development with methodologies such as XP and advanced software design principles. Site provides articles, download, and courses information.
- http://www.objectmentor.com/

Object Discovery Corporation
- provides public courses and on-site training in C++, CORBA, Java, Enterprise JavaBeans, OOAD, UML and Object Oriented Business Process Reengineering.
- http://www.objectdiscovery.com/

A Formative Evaluation of Scenario-Based Tools for Learning Object-Oriented Design
- Examines how a set of object-oriented design learning tools developed by Rosson and Carroll facilitate active learning. Published in ACM Crossroads.
- http://www.acm.org/crossroads/xrds5-1/eval.html