I'm looking for a plugin similar to the Eclipse plugins Veloeclipse or Velocity Web Edit for NetBeans.
Update: I tried the Velocity Editor Support plugin mentioned by Kathy Van Stone (thanks!), but it's not quite as robust as I had hoped. It doesn't support code folding, directive tag matching, or code completion, as far as I can tell. It could be a compatibility issue with NetBeans 6.5, though.