MenuMinder

MenuMinder lets you create quick, simple alert, email and SMS Text Message (mobile phone) reminders straight from your menu bar.

Quickly create a reminder using the system-wide menu that can be accessed from any application. Never forget anything ever again.
Attach tasks to your reminders. Schedule your computer to play a song, open a URL, run an application, or even run an AppleScript.
Enter an email server or use your default email account in Apple Mail.