MicroNova YUZU is an open-source (BSD license) EL-based JSP tag libary designed to augment JSTL (compatible with both JSP 1.2 and JSP 2.0). YUZU is used in commercial products such as ILOG JRules.
Features include:
YUZU consists of the following tags: set, out, map, eval, param, call, value, return, include, log, postData, throw, synchronized, query, update, response, system, filter, parseHtml, mail, mailFolder.
All YUZU tags follow a simple common behavioral pattern (prepare/import/default/process/assign/export) for ease of learning and extension.
YUZU is also hosted on SourceForge.