Here's how you can install a Num/Caps Lock applet on your Cinnamon desktop in Linux Mint 14 or 13.
1. Open a terminal window.
2. Type in the following commands then hit Enter after each.
wget http://goo.gl/44rlN -O Caps-Num-Lock.zip unzip -q Caps-Num-Lock.zip -d ~/.local/share/cinnamon/applets
For more, see the original article at the link below.