This plug-in is an Eclipse CDT (C/C++ Development Tooling) manged build extension for GNU ARM Toolchains like GNU Tools for ARM Embedded Processors, Mentor Sourcery CodeBench Lite, Yagarto, devkitPro, Summon, Linaro, etc. The project is hosted on SourceForge.
In short, the GNU ARM Eclipse Plug-in allows to create, build and in general to manage ARM projects (executables and static/shared libraries) with the Eclipse framework (currently tested up to Eclipse 4.3 Kepler). It runs on Windows, GNU/Linux and Mac OS X. For more details please visit the Features page.