

Apache Usergrid is an open-source Backend-as-a-Service) composed of an integrated distributed NoSQL database, application layer and client tier with SDKs for developers looking to rapidly build web and/or mobile applications. It provides elementary services (user registration & management, data storage, file storage, queues) and retrieval features (full text search, geolocation search, joins) to power common app features.

The Apache Axiom library provides an XML Infoset compliant object model implementation which supports on-demand building of the object tree. It supports a novel "pull-through" model which allows one to turn off the tree building and directly access the underlying pull event stream using the StAX API.

Apache Knox Gateway is an application gateway for interacting with the REST APIs and UIs of Apache Hadoop deployments.

Apache Pig is a platform for analyzing large data sets that consists of a high-level language for expressing data analysis programs, coupled with infrastructure for evaluating these programs. The salient property of Pig programs is that their structure is amenable to substantial parallelization, which in turns enables them to handle very large data sets.

Apache Struts is a free, open-source, MVC framework for creating elegant, modern Java web applications. It favors convention over configuration, is extensible using a plugin architecture, and ships with plugins to support REST, AJAX and JSON.

Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing.

Apache FreeMarker is a template engine and a Java library to generate text output (HTML web pages, e-mails, configuration files, source code, etc.) based on templates and changing data.

Quartz is a richly featured, open source job scheduling library that can be integrated within virtually any Java application - from the smallest stand-alone application to the largest e-commerce system.

Apache Nutch is a extensible and scalable open source web crawler software project.Nutch provides extensible interfaces such as Parse, Index and ScoringFilter's for custom implementations e.g. Apache Tika for parsing.
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