Do you have an awful memory?
Do your friends and family constantly remind you things that you have forgotten?
"Notify me" is a widget that will help because it allows you to set alarms quickly and easily on your phone without opening Google Calendar.
You can configure the three different buttons by setting the waiting time you want between 2 and 180 minutes. Your phone will alert you when time is over.
Use some of the preset reasons for alarm o write down your own.
You can also cancel an alarm by simply clicking the button where the active alarm is.
You can use it to alert you to do the backup with Titanium Backup, to advice you when a cooking time is over or anything you want.
To install on versions prior to 3.0 (Honeycomb) you must keep your finger on the home screen.
For version 3.0 or later, it is on the widgets menu.