m2eclipse Doxia editor
Just rebuilding Eclipse and thought I’d upgrade to the latest version of m2eclipse. However, it would seem like the latest version has dropped support for the Doxia editor (used for editing APT files), at least while they get ready for a v1.0 release (see this forum posting from Jason van Zyl).
However, all is not lost, because the Doxia editor is available from an archived update site, http://m2eclipse.sonatype.org/sites/archives/0.9.9.200909092308/. And it installs just fine in Eclipse Helios, with a later version of m2eclipse already installed: