Being lazy, I'll copy-paste an answer I wrote elsewhere:
I use Kile. I found a syntax highlighter at KDE-files.org. I modified it
based on the LaTeX highlighting file to (1) allow spell-checking only in
text sections and (2) show section* headings in bold. I prefer to use
the extensions,
Does anyone here uses Kile for ConTeXt? On
contextgarden-wiki I read has native ConTeXt support as
well. I installed Kile and as the only thing concerning
ConTeXt II found
Build - Compile - ConTeXt
But no highlighting or autocompletion. Google gave no answer.
Do I have to install an
