Eclipse Capra is a traceability management tool. It allows the creation of trace links between arbitrary artefacts, provides features to edit them and keep them consistent, and visualise the relationships between them.
Eclipse Papyrus-xtUML is a tool which supplies the capability to edit, execute and translate xtUML models. Executable, translatable UML (xtUML) is an extension to UML based upon the Shlaer-Mellor Method of Model-Driven Architecture (MDA), which supports a powerful approach to Model-Driven Development (MDD). Papyrus-xtUML provides the system design community with access to xtUML editing, execution and translation capabilities, along with a forum to advance the use of this methodology.
Visual languages are popular for visualizing concepts and systems. However, just being graphical in nature does not automatically make a diagram easy to understand. Its usefulness much rather depends on the placement of its elements, that is: on its layout. Getting the layout right is labour intensive and time consuming and can be made a lot easier by making algorithms do the work. The Eclipse Layout Kernel (ELK) provides such layout algorithms, as well as an infrastructure to connect them to diagram editors.