jEdit is a powerful text-editor. See its website for more informations.
The following information provides you with syntax-highlighting for ArmA's SQS (obsolete), SQF and SQM files.
jEdit allows users to write and modify the XML files that define its syntax highlighting, so we're providing instructions to achieve this.
First of all, download "arma_code_v_06jan07.zip" and put it in jEdit's 'modes' directory. Now we need to tell jEdit about it. Open up the 'catalog' file in the 'modes' directory. Between any two <MODE> tags insert the following:
I put it after "applescript" to maintain alphabetical order.
With all the files saved, jEdit should highlight ArmA-scripting functions. The appearance of the global syntax-highlighting can be changed under Utilities >> Global Options >> Syntax Highlighting.