Dwarf is a modular Java framework for developing network server applications based on Internet standards. While focused on building service-based applications like Web servers, mail servers, and messaging services, it can also be used for other applications. The core consists of several packages, which provide a multithreaded kernel, security based on the standard Java 2 Platform Security architecture and the JAAS, logging, configuration, and a management system. Modularity and a fine-grained API allow one to extend the server, to reuse the existing services for a new application, or even create new services based on the existing ones.
Jacksum is a platform-independent utility for computing and verifying checksums, CRCs, and message digests, as well as timestamps of files. It supports most common checksum algorithms. The format of the output is fully customizable. The program is large-file-aware, and recursive file processing as well as platform-independent file verification are supported.
gGo is a Go board, SGF editor, client for the Internet Go Server, and an interface for playing with GNU Go. gGo is written in Java and available for Linux, OS X, OS/2 and Windows. gGo is distributed free of charge. Go is an ancient boardgame, very common in Japan, China, and Korea.
GenealogyJ is a full-featured standalone Java application that can handle all of your genealogic information. It provides different graphical components for working on your family tree and is GEDCOM compliant. It requires a Java 1.4 Virtual Machine and runs on Windows / Mac / Linux.