Eclipse 3.7 (Indigo) has some major changes, for example as of 3.7 the plugins for Maven and Git has been officially integrated into Eclipse JavaEE version.
So , some of the update links for plugins of Eclipse 3.7:
(should install svn client before Subclipse, e.g. Windows users: http://www.sliksvn.com/en/download )
EGit & JGit (built-in Eclipse 3.7)
m2e (built-in Eclipse 3.7)
m2e connectors (alternative: ‘Maven’ -> ‘Discovery’ -> ‘Open Catalog’) :