I need a nice JSP editor plugin for Eclipse. What are my choices?
Check out this one, it's open source http://amateras.sourceforge.jp/cgi-bin/fswiki_en/wiki.cgi?page=EclipseHTMLEditor
As well as Amateras you could try Web Tools Project or Aptana. Although they will both give you way more than just a jsp editor.
-- Edit to pull in the answer from Simon Gibbs.
The Web Tools Project JSP editor is in the "Web Page Editor (Optional)" project.
Oracle Workshop for Weblogic is supposed to have a pretty nice jsp editor but I've never used it. You needn't be using Weblogic to use it.
MyEclipse has a pretty decent one, it costs money however. One of the reasons I went over to Netbeans is because of their JSP editor, which is still far from perfect but better then vanilla Eclipse.
Bravo JSP Editor (Can't comment on how good it is, i haven't tried it) http://marketplace.eclipse.org/content/bravo-jsp-editor