It was called Tex-Edit Plus and through the early years of OS X I lost track of the app and moved on to BBEdit and other editors with more capability. Today I ran across an updated version of Tex-Edit Plus, downloaded it, installed it, and used it. Ah, those glorious memories of yesteryear, reborn in the 21st century.
If you’re interested in a good text editor that’s also scriptable, and works with AppleScript and Automator in OS X, this is a good one to try. The latest version plays nice with OS X 10.9 Mavericks, extracts text readable text from HTML files, and generally sits nicely between Apple’s TextEdit and Bean, my favorite Mac word processor.
Tex-Edit Plus still has that 1999 look with floating palettes of tools and a barebones (no pun intended) editing window with absolutely no visual clutter.
No, Tex-Edit is neither as capable as BBEdit or other programmer text editors, nor as complex, but it’s a very good way to get started into editing or programming, especially with AppleScript, so it’s highly recommended.