Record and replay system for Tcl/Tk

TKReplay
tcldb
Android
Xt replay library
TkXext
Squish/Tk
Undo and Redo undoable widgets - while not of itself a record and replay system, it should be simple to record the list of 'undo' commands (to a file) and then redo them. Exercise for the interested reader.
Virtual User
Techniques for 'driving' Windows applications
x11guitest [1] is a Perl system that "... works great" for Roger Oberholtzer.