This project is an open source repository for JSP™ Tag Libraries.
In particular, Apache Taglibs hosts the Apache Standard Taglib, an implementation of the JSP Standard Tag Library specification. Versions 1.0 and 1.1 of JSTL are implemented, and a 1.2 implementation is in the works.
Apache Taglibs was originally called Jakarta Taglibs. When the project changed name, and moved over to coexist with the Tomcat project, many of the original taglibs were retired. See the Jakarta Taglibs retirement page for more on these taglibs.