Articles
A very useful summary of articles and resources available for Jakarta Commons may be found at Java201.
Extend the JDK Classes with Jakarta Commons, Part I - Explore the components in the Jakarta Commons set of reusable classes and you'll be convinced that most of them should be part of the JDK. Learn which ones you should use in your projects. - Narayanan A R
Extend the JDK Classes with Jakarta Commons, Part II - This second installment of a three-part series further explores components in Jakarta Commons and presents real world examples to demonstrate how you can use them in your projects. - Narayanan A R
Extend the JDK Classes with Jakarta Commons, Part III - Explore Jakarta Commons components that enable you to parse arguments in a command-line application, connect to various file systems at the same time, allow an application to uniformly access configurations loaded from various sources, and pool any object. - Narayanan A R