1. eclipse
http://www.eclipse.org/downloads/
2.subclipse
http://subclipse.tigris.org/servlets/ProjectProcess?pageID=p4wYuA
3.startexplorer
http://basti1302.github.io/startexplorer/
4.m2eclipse
http://wiki.eclipse.org/Maven_Integration
5.sonar
http://dist.sonar-ide.codehaus.org/eclipse/
6.eclemma
http://update.eclemma.org/