Memo HD!

Memo is a simple and elegant app for quickly jotting down notes on your Mac. Memos are like sticky notes on your computer screen (minus the residue). Pop open a new memo in less than a second and use it to jot down phone numbers, messages, meeting notes, or write down ideas before you forget them. You can assign different colors to your memos to visually set them apart. Choose from yellow, red, green, blue, or purple. The Memo app supports rich text in dozens of font families.