Futallaby
Futallaby is an Imageboard script. A Futaba Script fork made by the Raspberry Heaven community. Namely: thatdog with collaboration from moot and terra. It started development in November 10, 2003, released v031222 on December 22, 2003 and a final version v040103 on January 3, 2004. Development stopped at some point, after a fallout between moot and thatdog.[1]
Futallaby's sudden development stop saw it be supplanted by Waha's Wakaba. W.T. Snacks took over as 4chan's website dev, making considerable upgrades to 4chan's Futallaby fork, announcing v081404 in August 14. At some point between 2005 and 2010, Futallaby's codebase was complete phased out by what's today known as Yotsuba Script.
The only other sites to have run Futallaby are:
Albeit, technically, there's been short lived imageboards running 4chan's leaked source from 2005.
