S-lang is a c programmer's library that includes routines for the rapid development of sophisticated, user friendly, multi-platform applications.

the s-lang library includes the following:
* low level tty input routines for reading single characters at a time.
* keymap routines for defining keys and manipulating multiple keymaps.
* a high-level key processing interface (slkp) for
handling function and arrow keys.
* high level screen management routines for manipulating both
monochrome and color terminals. these routines are very
efficient. (slsmg)
* low level terminal-independent routines for manipulating the display
of a terminal. (sltt)
* routines for reading single line input with line editing and recall
capabilities. (slrline)
* searching functions: both ordinary searches and regular expression
searches. (slsearch)
* an embedded stack-based language interpreter with a c-like syntax.