wmctrl

UNIX/Linux command-line tool to interact with an EWMH/NetWM
https://sites.google.com/site/tstyblo/wmctrl

Current version
1.07

wmctrl requires the following formulae to be installed:
pkg-config 0.29.2 Manage compile and link flags for libraries
glib 2.54.2 Core application library for C
gettext 0.19.8.1 GNU internationalization (i18n) and localization (l10n) library

Formula history

Viktor Szakats wmctrl: https in comment
Mike McQuaid wmctrl: import from homebrew/x11.