Scripturian is a compact library that makes it very easy to integrate JVM languages (which support JSR-223). It lets you embed "scriptlets" into text documents, in the style of PHP, JSP, and ASP. It also allows boot strap JVM applications using any of the supported languages, which makes it easy to quickly configure and make changes in how your applications start up without re-compilation.
Succinct is a minimal templating engine designed for concurrency and efficiency. It has an especially abstract data model, allowing you to back your templates by fetching template data on-demand, during render-time, according to your own complex synchronization protocols. It comes with lots of tools to help you make your data "templatable."
Java Gearman Service is a Java implementation of the gearman service, which provides a generic application framework that farms work out to other machines or processes that are better suited to do the work. It allows you to do work in parallel, to load balance processing, and to call functions in other languages. It can be used in a variety of applications, from high-availability Web sites to the transport of database replication events.
Moqui Framework is a seamlessly integrated, enterprise-ready framework for building enterprise automation applications based on Java. It includes tools for database interaction (relational, graph, document), logic in local and Web services, Web and other UIs with screens and forms, security, file/resource access, scripts, templates, localization, caching, logging, searching, business rules, workflow, multi-tenancy, and integration.
Fuseki is a server that provides access to the SPARQL 1.1 standard. SPARQL is a W3C query language for RDF data on the Semantic Web. It forms a part of the Jena semantic web project. Fuseki provides the REST-style SPARQL HTTP Update, and SPARQL Query and SPARQL Update using the SPARQL protocol over HTTP. The SPARQL standards are works-in-progress by the SPARQL working group and while the general designs are stable, details may change. Fuseki will track the draft standards.