The notion of Design by Contract is central in the systematic approach to object-oriented software construction, as embodied in the Eiffel method. This article presents the key ideas. http://archive.eiffel.com/doc/manuals/technology/contract/
Extensive collection of the top resources for object oriented analysis, design, programming, and testing. References to some of the top personalities in the field. http://www.itmweb.com/ooprogram.htm
Happenings and learning material about Portlets, OOA/D, Software Architecture and Design, Design Patterns, Software Methodologies, J2EE. http://www.jroller.com/page/portlets
A site providing systems, application development, and object oriented methodology information. Includes CASE tools, UML papers, and summary methodologies for software engineering. http://www.geocities.com/itmweb/