OSCache by OpenSymphony
OSCache by OpenSymphony is a caching solution for Web applications. OSCache includes a JSP tag library and a collection of classes to perform dynamic caching of JSP output, servlet output or even arbitrary objects.
OSCache supports both memory and disk based caches. Disk based allows serving content even when the backend (database) is unavailable. Servlet filter component can be used to cache binary content generated by server.
OSCache is compliant with servlet 2.3 and JSP 1.2 standards. The caching is i18n aware and supports all encodings.