Feed Notifier is a program for Mac OS X and Windows which resides in the system tray or status bar. It displays pop-up notifications on your desktop when new items arrive in your subscribed RSS or Atom feeds. It supports all common RSS and Atom web feed protocols. It has clean look and feel, does not get in your way. It has configurable polling interval for each feed. It has configurable popup duration. It has configurable popup size, position, and transparency. It has configurable popup border sized and color. It offers pop-ups which do not steal keyboard or mouse focus from other applications. Its popup shows item age and author. It has navigation controls in the popup to view next or previous items. It has advanced filtering options. It supports launching from fire fox and other browsers through the protocol. It supports enabling and disabling individual feeds. It deactivates when the user is idle to save bandwidth and processing time. It supports authenticated feeds that require a username and password. It supports using a proxy server. It displays favicon for feeds when available. It has multi thread feed polling.