Install Indicator Reminder in Ubuntu 13.04/12.10/12.04/Linux Mint

Install indicator Reminder in Ubuntu 13.04 Raring/Ubuntu 12.10 Quantal/Ubuntu 12.04 Precise/Linux Mint 14/13

Indicator Reminder is an indicator app specially designed for Ubuntu to set schedule reminders. It is build using the development tool Quickly and written in Python using GTK+. Indicator Reminder is licensed under the GNU General Public License version 3. These reminders can be configured to play a sound, show a notification, and/or run a command. Want to wake up in the morning? Schedule a reminder every day with music to wake you up.
Indicator Reminder has a powerful date/time selection feature that allows you to express recurring dates/times in plain English. For example: "every day", "every Monday , "every other", "every weekday", "every 30 minutes", and more!. They can also be set to repeat minutely or hourly.

To install indicater reminder in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:

Terminal Commands:
sudo add-apt-repository ppa:bhdouglass/indicator-remindor
sudo apt-get update
sudo apt-get install indicator-remindor

or install Reminder-qt via this command:

Terminal Commands:
sudo add-apt-repository ppa:bhdouglass/indicator-remindor
sudo apt-get update
sudo apt-get install remindor-qt

That's it

Source: Indicator-Remindor