LilyPond tool provides a plugin for jEdit with a lot of features that can help making LilyPond scores faster, easier and with less error. Features include:
Document Wizard to set up documents easier with lyrics support
Integrated DVI viewer with point-and-click support
Structure browser with code folding
Simple parser for finding simple errors
Convenient running of LilyPond and related tools, with an integrated cygwin shell
Automatic code completion for typing commands and tweaking properties
Automatic hyphenation of lyrics using TeX