Visual Interactive Datapipe (Vida) is an interactive visual datapipe for all *nix systems, which allows socket communications to be redirected over pipes. It features an ncurses interface that allows the creation of multiple datapipes, each supporting multiple connections. It is possible to sniff and log traffic in various ways, hijack piped connections, perform DNS hijacking on switched LANs, and much more.
Abbot is a framework for testing Java GUIs. It lets you launch an application or GUI component, play back user actions on it, and examine its state. Tests may be coded or scripted. The editor supports recording user actions into a script, exploring the component hierarchy, running the script, and other features you'd expect from a script editor. Test scripts are JUnit extensions.
Eclipse is a kind of universal tool platform - an open extensible IDE for anything and nothing in particular. The real value of Eclipse comes from tool plug-ins that "teach" Eclipse how to work with things - java files, web content, graphics, video, etc. Eclipse allows you to independently develop tools that integrate with other people's tools seamlessly.
SBLIM (pronounced "sublime"), the Standards Based Linux Instrumentation for Manageability is an IBM Open Source project, intended to enhance the manageability of GNU/Linux systems. It does so by enabling GNU/Linux for WBEM, Web Based Enterprise Management, a set of standards defined by the DMTF and fostered by the WBEMsource initiative.