feffit(1) on Linux
The text 641753d091bd, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch) shipped it. The page shows this text now.
program for analysis of XAFS data