Bluefish is a powerful editor for experienced web designers and programmers. Bluefish supports many programming and markup languages, but it focuses on editing dynamic and interactive websites.
A powerful editor and graphical debugger for code written in Scilab
Scipad is a powerful editor and graphical debugger for programs written in the Scilab language. It is a mature and highly configurable editor, almost entirely written in Tcl/Tk. Scipad is a free software running on Linux and Windows. Licence is GPL V2.
The Pawn will make it possibly for you to tell the computer exactly what you would like it to do. Fiction. No its reality now. The highly customizable slackware will be the base for Pawn.
Geany is a small and lightweight integrated development environment. Basic features are syntax highlighting, code completion, code folding, call tips, many supported filetypes.