CrowdMail has email template gallery where you can find free to use templates that you can use inside your email campaigns.
You can check the email template gallery from your CrowdMail dashboard under Templates > Gallery.
From the Gallery, you can import email templates of your choice inside your own “My Template” gallery and then use it inside your email campaign.
Further, you can search for “HTML Email Templates” in search engines, where you can find thousands of Free & Paid Email Templates.
You can also order HTML Email Templates from Themeforest Marketplace.
Note: When you are building an email template at an external editor or purchasing from external sources, you should first export the email template in .zip file and then import them inside CrowdMail Template gallery before starting to use it in an email campaign. While importing email template follow this guide.