Prefixed Properites extends java.util.Properties with the advantage that it supports filtering of properties by a prefix or set environment. You can have cascading environments like a staging level, a host, a group, a service, a component, and many more. Use them all together within one configuration file, and define defaults for any key on any environment level. Use XML, properties, and JSON files to load and store your configuration. You can also change the configuration on the fly on a request-dependent level. Prefixed Properties can be used on a standalone basis, or you can use it within your SpringContext.
jCores is a Java library that feels like jQuery, with many shortcuts and transparent parallelism. It was made to denoise programming in the Java language and to increase execution speed. Its goal is to demonstrate that Java, the language, can be as sexy as Python in terms of hacking and as parallel as your hardware gets in terms of CPUs.
lsfw (list firewall) helps network administrators deal with firewalling on a huge network. It lists the firewalls rules applied between two points on the network. It uses the configuration of the network equipment and builds a (light) model of the network described by the equipment. This allows probing for access-list matching all over the network, doing routing and firewalling.
nioReactor is a framework for quickly building scalable event-driven network applications. It is built on top of the Reactor design pattern using NIO sockets. This provides high performance and allows for a complete separation from the application specific code. The goal of the project is to provide a simple set of APIs that allow users to build scalable servers without needing to deal with with the cumbersome and sometimes temperamental peaces of the NIO package.