Smooth Build is a build tool which provides a functional language which lets you describe a build process in a simple and readable way. A build script for a simple Java program can be as simple as "app.jar: files("src") | javac | jar;" All built artifacts are cached and indexed (hashed) using the sha1 of the expression (function name and its arguments) which returned a given artifact. This way, Smooth never builds the same artifact twice.
SBuild is a Scala-based build system. It features platform independence, multi project support, automatic detection of needed actions, automatic up-to-date detection, a flexible scheme handler mechanism, Maven repository support, Ant task integration, automatic cross-project resolving of dependencies, high speed, a simple "syntax" that requires almost no Scala knowledge, behind-the-sceens compilation of build script to bytecode for fast execution time, and built-in scheme handlers for HTTP and Maven.
FitNesse Maven Classpath Plugin is a Maven2 plugin that collects the dependencies of the entire project, including its sub-modules. After resolving the artifacts, it generates the classpath and inserts it into the Fitnesse test suites, thus solving the problem of maintaining the correct classpath in FitNesse.
Kundo provides a structured, convention based approach for Java builds. Kundo has a pluggable, extensible architecture; it harnesses the power and flexibility of Groovy and Ant to provide a highly configurable Java build framework. Kundo achieves this flexibility with a plug-in architecture that attaches behaviors (provided by Kundo plug-ins) to build lifecycle phases. Kundo consists of a kernel and a set of foundation plug-ins. The kernel is responsible for the orchestration of the multiple collaborators within the build system.
JCatapult is a development platform written in Java. Built for modularization, JCatapult allows developers to build modules such as a blog, content-management system, wiki, or any other reusable set of features and use them across multiple applications. Built on top of open source technologies, JCatapult is a robust and scalable platform. However, it is also agile and lightweight because it uses a convention over configuration approach.