XEmacs
The famous Emacs editor/IDE. Syntax coloring, automatic indentation,
multi language (C, C++, Java, Ada, Python, Perl, Lisp, HTML, asm, ...),
incremental search, tag search, many modes (compile, gdb, mail,
news, browser, shell, ...), and more and more and more.
Well, you don't need anything else than... Emacs...
