The Chilkat Ruby MIME and S/MIME library provides an advanced API for creating and manipulating MIME and S/MIME messages. The Chilkat Ruby MIME and S/MIME library provides an advanced API for creating and manipulating MIME and S/MIME messages. The Chilkat components and libraries have an established user base of approximately 10,000 customers. Chilkat's licensing provides for free new-version upgrades, 1 year unlimited email and phone support, and royalty-free redistribution.