Free Marker plugin
This provides syntax highlighting, etc. for the Freemarker (FTL) language.
Note: If you decide to use this, you'll need to copy an up-to-date freemarker.jar file (2.3.8 or better) into the Eclipse plugin directory. For some reason, the plugin ships with an old jar, and some syntax that's valid gets marked as a compile error.
Project homepage: http://freemarker.sourceforge.net/eclipse.html
Automatic update URL: http://www.freemarker.org/eclipse/update