Quartz is an enterprise-class job scheduler for integration with stand-alone Java applications and full-scale J2EE applications. Advanced features include clustering and participation in container managed transactions. It is highly scalable, very lightweight, and supports very complex scheduling.
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.
HN_htusers is a PHP class to manage users and groups in Apache Web server environments, with optional extra information for users. It uses Apache-style MD5-crypt passwords. It uses built-in CSS styles. Validation (min-max length, allowed characters) is built-in for all entries. The locking mechanism is robust. It includes examples of how to test your setup, how to embed a dynamic form for changing passwords into existing HTML code, using HTTP-Auth with .htaccess files in directories, and using HTTP-Auth without .htaccess files but with PHP.