Siag is a spreadsheet based on X and Scheme. I originally wrote it out of frustration with the fact that almost no free, good looking applications were available for Linux. It is based on my old program Calc, which I started writing in the late -80's...
Siag is an X-based spreadsheet for Unix. It uses Scheme (a Lisp dialect) both for expressions and as an extension language, which makes it easy to create new functions (for native Lispers, that is). There is no requirement to know Scheme to use Siag, expressions can be entered in traditional spreadsheet syntax as well...
The program has existed in several incarnations: text-based curses for SunOS, text-based hardcoded vt52 for Atari TOS, GEM-based for Atari, Turbo C for DOS, Xlib-based for Linux and now Xt-based for Linux (or Unix, really).
Also known as: Scheme In A Grid