Types that extend and augment the Java Collections Framework.

Commons Object Pooling Library

The HttpClient component supports the client-side of RFC 1945 (HTTP/1.0) and RFC 2616 (HTTP/1.1) , several related specifications (RFC 2109 (Cookies) , RFC 2617 (HTTP Authentication) , etc.), and provides a framework by which new request types ...

The Digester package lets you configure an XML to Java object mapping module which triggers certain actions called rules whenever a particular pattern of nested XML elements is recognized.

Commons-IO contains utility classes, stream implementations, file filters, and endian classes.

The Math project is a library of lightweight, self-contained mathematics and statistics components addressing the most common practical problems not immediately available in the Java programming language or commons-lang.

Jexl is an implementation of the JSTL Expression Language with extensions.

The Apache Commons Discovery component is about discovering, or finding, implementations for pluggable interfaces.

Commons BeanUtils Core

The Commons Jexl library is an implementation of the JSTL Expression Language with extensions.