This is bashrun running under openbox, with all window decarations removed. See the FAQ for instructions on how to disable window decorations in your wm.
Here bashrun is running in a slightly larger window,
with COMPLETION_TYPE set to complete.
This screenshot shows bashrun placed within the bottom margin of
an openbox desktop, using the
option KEEP_OPEN=yes. In this mode bashrun will be
kept open permanentely. Subsequent invocations
of bashrun or
bashrun --show will focus the terminal, C-g will
return the focus to the previously focused window. (This
requires xdotool to be installed)