indicator-lockkeys is just another indicator for Lock Keys with fancy icons, which allows you enabling and disabling Caps Lock and Num Lock directly from the Graphical User Interface.
Installation
Use the following ppa:
sudo add-apt-repository ppa:l3on/indicator-lockkeys
sudo apt-get update
sudo apt-get install indicator-lockkeys
Then run indicator-lockkeys
from the command-line or logout and login again in Unity.
Manually
Checkout the git repository:
git clone https://github.com/LeoIannacone/indicator-lockkeys
Install the deps:
sudo apt-get install valac libgtk-3-dev libappindicator3-dev libcaribou-dev libgtk-3-bin
Build and install system wide:
cd indicator-lockkeys
make
sudo make install