If anybody still uses HQL with NHibernate, it would probably find useful some editing with intellisense.

Using the SharpDevelop Text Editor, the ANTLR grammar from the NHibernate sources, and some hacking in the java Eclipse Plugin code, the results is this:

Ctrl+Space completion 1: entity alias

Ctrl+Space completion 2: Entity names

Dot completion: property completion

Ctrl+Space completion: all keywords and functions

Here you can find the related sourceforge project.