Programmers' text editor of choice in the MS-DOS era of computing. Developed by SemWare. It had advanced features such as macro facility, automatic C code indentation, column block selection and multi-file editing. It could display up to eight text-mode windows and was very customizable, allowing the user to configure all the keyboard shortcuts. Perhaps its modern Windows equivalent could be the feature-packed UltraEdit.

I really didn't use it that much in the old days, and now I've probably lost my chance, having become a bit of a Vim zealot.