Resin's Eclipse plugin is based on the proven Eclipse Web Tools Platform (WTP). You must have the WTP installed for the Resin plugin to work. Generally, if you download the Eclipse IDE for Java EE Developers, it will automatically include the WTP. This is by far the easiest way to get started. Otherwise, you can add the WTP to your Eclipse installation yourself.
The Resin Eclipse plugin supports Helios (Eclipse 3.6) and above.
For Indigo (Eclipse 3.7) and above, the Resin plugin is already registered.
If you're using Helios (3.6), the plugin should be installed through the Resin Eclipse Plugin update site.
Detailed instructions on how to install the plugin for your version of Eclipse are described below. (more...)