For making sure everyone on our team works with the same set of plugins, we are using the notion of "group of plugins" in a Nexus Pro (so non-free) repository
Nexus Professional has support for Eclipse P2 repositories, and it can serve Eclipse plugin artifacts to tools that know how to interact with the Eclipse P2 repository format including Eclipse 3.4 Ganymede.
If you use the Eclipse IDE, you probably have a set of plugins which every single developer needs to install to get productive.
Using Nexus Professional, you can combine multiple Eclipse update sites into a single URL which your developers can use when they are configuring a development environment.
Using Nexus Professional as a single point-of-access between your developers and the Eclipse update sites they depend on allows you to manage and define a set of common Eclipse plugins in your organization's Eclipse development environment.