Cooledit

Full-featured X Window text editor; multiple edit windows; 3D Motif-ish look and feel; shift-arrow and mouse text highlighting; column text highlighting and manipulation; color syntax highlighting for various sources; builtin Python interpretor for macro programm.; spell check as you type; interactive graphical debugger - interface to gdb; key for key undo; macro recording; regular expression search and replace; pull-down menus; drag and drop; interactive man page browser; run make and other shell commands with seamless shell interface; redefine keys with an easy interactive key learner; full support for proportional fonts;.