From the DYNDNS "about" web page:
Personal Web Hosting: Serve your own website from home with our Dynamic DNS Free service and XAMPP.
Blogging: Want to give the world a piece of your mind? Using the Dynamic DNS Free service and Wordpress, you can host your own blog, giving you absolute freedom and control over every aspect from color to content.
VPN: Did you forget your research paper or company presentation at home? The Dynamic DNS Free service and TightVNC or OpenVPN will let you access your files remotely from anywhere in the world.
Picture Gallery: Are you an aspiring artist or photographer, and want to share your work with the world? Simple Picture Gallery Manager and our Dynamic DNS Free service allows you to host your own photos, offering complete control over content, display and access.
Personalized Domain Name: Have you always dreamed of having your very own website, complete with personalized email addresses? Our flagship Custom DNS service, domain registration, MailHop® Forward and MailHop Outbound will give you the freedom to offer your visions to the world.