WireNote

WiredPlane.com :: WireNote - Lightweight PIM with Sticky notes, Reminders, LAN messenger and anti-spam filter:

"With WireNote, you can quickly create Sticky Notes and ToDos from the tray icon, the main window, or a hotkey. You can prioritize ToDos, and log and analyze the time spent on each with the ToDo report feature.
You can schedule Reminders to play sounds, display Notes or ToDos, send messages to other users, start programs, or even shut down your computer. If WireNote is installed on more than one computer on a LAN, you can send Reminders to other users or store them in a shared folder making them visible to all users."