Malayamarutham is a free font available for personal use as well as commercial use. you can use Malayamarutham font for any publishing work, digital or printed media.
Downloading and Installing The Malayamarutham Font
before installing Malayamarutham font you have to download Malayamarutham 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 Malayamarutham.ttf and then click install.
or you can Malayamarutham font files (.ttf) inside "fonts" folder in System Drive > Windows > Fonts folder.