MacWindowsLister

Lists user's windows (process name, non-empty window title) and marks the active one.

Reference: [Important] Uniquely identify active window on OS X
http://stackoverflow.com/questions/7422666/uniquely-identify-active-window-on-os-x/7423297#7423297

Getting Window Number through OSX Accessibility API
http://stackoverflow.com/questions/6178860/getting-window-number-through-osx-accessibility-api

mackuba/WindowFairy
https://github.com/mackuba/WindowFairy/blob/master/WindowManager.m

Frontmost window of the current application that passes a predicate check
http://codereview.stackexchange.com/questions/87772/frontmost-window-of-the-current-application-that-passes-a-predicate-check