My laptop has a big drawback, it does not have LED indicators for NumLock, ScrollLock or CapsLock. Its difficult to know if they are active or not, especially while typing passwords, where i keep typing the correct password and it does not let me in as my CapsLock is on and i'm unaware of it.

A relief is that Ubuntu has a separate applet which shows me whether my CapsLock is on or not. Indicator Keylock displays a small notification when you on or off lock keys while typing. It can be downloaded by typing these commands in the terminal.

It also provides three icon packs for you to install, choose your favorite: Mono, Humanity and Elementary. Install only one.

Unity Mail is a free applet that allows a user to have a track of the emails he receives. The app is simple and small in size, and is perfect for people in a move.

To Install Unity mail, you have to go to the Ubuntu Software Center and install Unity Mail, or for a more technical installation, you can use the terminal and run the following commands.

Note: This tutorial is for versions 12.04, 12.10 and 13.04

My Weather Indicator is an excellent app that shows weather forecasts and current weather of an area. Use to to keep yourself up to date with the weather around you. 

To install, simply run the following commands from a terminal window on your Ubuntu PC. Authenticate with your password if asked to do so.