Right-click the downloaded and select Extract All . Open the folder and double-click the Senthamil.ttf file. Click Install at the top of the preview window.
While technical, the official Unicode sites maintain character charts. For developers, a from GitHub repositories (like "Project Madurai") is safe. Look for repositories that have been updated within the last 2 years. senthamil font zip download
TrueType Fonts (.ttf) contained within a compressed .zip folder. Design Styles: Right-click the downloaded and select Extract All