By Tropical Software, Inc.
Open the Mac App Store to buy and download apps.
Easy to use reminder app. Semi-transparent tab takes up a tiny space on your screen but has numerous options for reminders including flashing icon on dock, flashing tab red, alert and sound.
Hides just offscreen as soon as any app opens, but unhides when mouse moved over tab. Lots of entry shortcuts, like "today", "tomorrow", "Wednesday" where it just does the right thing!