QuickBuild is a continuous integration and release management server, acting as the central place to produce, test, deploy, and release software builds. It is designed to guard the health of your project by preventing broken builds, and to improve your build delivery process by pushing builds through a customizable pipeline (for example, dev->QA->release) with related information connected such as resolved issues and relevant SCM changes.
EBuild is a software project build, dependency management, and reporting technology. The aim is to be able to tackle any build problem in a structured, declarative, and elegant way. It is written in Java, but can be used to build all manner of projects and is extensible via a plugin interface. It is best compared to something like Maven (and in some respects Ivy). It aims to overcome certain design flaws and the resultant unnecessary complexity. The EBuild build model is general, but plugins need to be written in a JVM compatible language. Existing plugins all deal with the Java ecosystem, so EBuild is most suitable for Java and mixed technology software projects.