I use CFEclipse for most of my projects and heavy lifting but sometimes I find the need to do a quick fix on pages outside the project scope that is easier to accomplish in
This question is a few years old now, and unfortunately, the accepted answer involving nppColdFusion is no longer valid because the plug-in doesn't work with NP++ after version 5.x.x and is not being maintained. (It stopped working when Notepad++ switched their plug-in hooking mechanism in version 6.x.x)
The Notepad++ site points to a library of nearly every language highlighter available: http://sourceforge.net/apps/mediawiki/notepad-plus/index.php?title=User_Defined_Language_Files
ColdFusion (specifically CF9) is listed: http://notepad-plus.sourceforge.net/commun/userDefinedLang/userDefineLang_CF9.xml
It's not as good as a full plug-in like nppColdFusion, but it is better than pages of black text.