The Netty project is an effort to provide an asynchronous, event-driven network application framework and tools for rapid development of maintainable, high-performance, high-scalability protocol servers and clients. In other words, Netty is a NIO client server framework that enables quick and easy development of network applications such as protocol servers and clients. It simplifies and streamlines network programming such as TCP and UDP socket servers.
OpenSymphony Workflow is a very flexible workflow system that can be plugged in to almost any need or existing application. Uses can range from document management to order processing to project management. It includes support for many different interface mechanisms (SOAP, EJB, Java Class) as well as persistence (EJB, JDBC, XMl, Ofbiz). It works in any J2EE container, including servlet containers (without EJB support).
JGame is a 2D game engine that makes multi-platform development easier. It runs on the Java JRE 1.3+ platform with optional OpenGL (JOGL) enhancements, the J2ME (MIDP2.0/CLDC1.1) mobile platform, and the Android (2.1+) platform. JGame features sprites with automatic animation and collision detection, a tile-based background with easy sprite-tile interaction facilities, automatic scaling, sound, game state, persistent storage, and game options. The engine provides an enhanced graphics API with a fallback to simpler and more efficient graphics on J2ME and plain JRE. A patched version of the JBox2D physics engine that runs on all platforms is included.
Velocity is a Java-based template engine. It permits anyone to use the simple yet powerful template language to reference objects defined in Java code. When Velocity is used for Web development, Web designers can work in parallel with Java programmers to develop Web sites according to the Model-View-Controller (MVC) model, meaning that Web page designers can focus solely on creating a site that looks good, and programmers can focus solely on writing top-notch code. Velocity separates Java code from the Web pages, making the web site more maintainable over the long run and providing a viable alternative to Java Server Pages (JSPs) or PHP. Velocity also provides template services for the Turbine Web application framework, making a template service that allows Web applications to be developed according to a true MVC model.
GRAL is a library for creating high quality plots and charts in Java. Many plot types are available like scatter plot, bubble plots, line plots, area plots, pie charts, and bar charts. Additionally, GRAL can exchange and process data (smoothing), and various plug-ins allow the import and export of data and graphics to formats like CSV, JPEG, PNG, EPS, PDF, or SVG.
Unified I/O is high performance Java I/O library. It features high performance (due to buffering), memory management, the ability to access streams, arrays, and files using the same interface, the ability to read or write directly from or into primitive arrays, and optimized reading over HTTP. Unified I/O also contains many utilities: Transformer, BitInputStream and BitOutputStream, PackBits, a RLE4 and RLE8 decoder, a base64 codec implementation, and many others.