Kalaimakal is a free font available for personal use as well as commercial use. you can use Kalaimakal font for any publishing work, digital or printed media.
Downloading and Installing The Kalaimakal Font
before installing Kalaimakal font you have to download Kalaimakal font and save on your hard drive. then unzip it using any program or windows / mac default options.
then right click on the ttf files named Kalaimakal.ttf and then click install.
or you can Kalaimakal font files (.ttf) inside "fonts" folder in System Drive > Windows > Fonts folder.