Cetus Links: Languages: Over 11,000 links on objects and components.
Object Oriented FAQ: Object FAQ: The most comprehensive resource on object technology anywhere.
Object Oriented Programming in C: Paul Field's fine, clear paper, published in C Vu 4:1 (November 1991), on how to use an object-like discipline with a procedural language.
Object Oriented Programming: A guide for the beginner, from Modula-2 to Java: Tutorial teaching basics of object oriented programming. Tailored to no one specific language, but examples are in C++, Java, Modula-2.
Object Technology: General introduction; documenting; suppliers, consulting firms, consortia; patterns, frameworks, class libraries; distributed objects; languages; databases; operating systems; modeling, methodologies; publications, people.
Object-Oriented Programming: Growing article, with links to many related topics. [Wikipedia]
Objects on the Web: Designing, Building, and Deploying Object-Oriented Applications for the Web: By Ron Ben-Naton.
OO Language Page: Includes links to information on OOPLs, user group and JDK, IDE and libraries.
OOP 2005 Conference: (January 2005) presents object-based solutions in an expansive and fully comprehensive forum for users, experts and leading vendors.
Planet Source Code: Lets OOP programmers submit code for review by other programmers; many source code samples to help educate beginners on many concepts; contests where programmers vote for the most efficient, useful code recently submitted.
The Object-Oriented Page: Large, well researched list of OO issues, languages, projects, and links. Excellent resource.
WebReference.com: Class-Based vs. Prototype-Based Languages: Brief explanation by Yehuda Shiran, Ph.D.
What is Object-Oriented Programming?: Definition, lists some links for more information. [Webopedia]
What is Object-Oriented Software: An Introduction: Simple explanations for object newbies.