Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian provides more than a pure OS: it comes with over 59000 packages, precompiled software bundled up in a nice format for easy installation on your machine.
I liked that text editor—it was different, terminal-based but not clunky. Unfortunately, it was removed, and as far as I know, trying to rebuild it from the source code is largely impossible due to some strange dependencies. Just wanted to share that :)
You're very welcome. I used it a lot before I had to learn vi for work reasons.