bookview(1) on Linux
The text ee15a093b04b, as 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.
NDTP (Network Dictionary Transfer Protocol) client written in Tcl/Tk