S-Lang

The S-Lang programming library is a software library for Unix, Windows, VMS, OS/2, and macOS. It provides routines for embedding an interpreter for the S-Lang scripting language, and components to facilitate the creation of text-based applications. The latter class of functions include routines for constructing and manipulating keymaps, an interactive line-editing facility, and both low- and high-level screen/terminal management functions. It is free and open-source software released under the GNU General Public License.