I understand that the new M2E within Eclipse has pluggable connectors which help configure the Eclipse project based on what they see in the POM when the project is imported.
I also believe that (for the most part) these connectors are automatically installed when they are needed (on demand). I've been using them with some success. Recently I manually installed the M2E-WTP connector because I wanted to try it out.
I installed it via Eclipse->Preferences->Maven->Discovery
where I also found a bunch of additional connectors. But the discovery window seems to only show you ones that you DON'T have installed.
But how do I know which ones I DO have installed?
You can see the list in Installed Software, go to Help->About Eclipse->Installation Details. In that list are the list of connectors: