If you want a tool to make personalized and fun greeting cards, RingleDingle is a good option. The service, which uses AI to create personalized musical greeting cards, lets you add your own illustrations and music even if you're not artistic. You fill in the blanks for the message and other details, and the AI creates an illustration and poem, along with a scannable QR code that opens an e-card with a corresponding song. That means anyone can send personalized and entertaining greeting cards for birthdays, Christmas and other occasions.
Another good option is Canva, a free online graphic design tool with a vast library of templates and features to suit different design styles. It's geared more toward general-purpose designs, but it's got AI-powered tools for generating text and editing photos, so you can easily create greeting cards that look professional and personalized. It also supports real-time collaboration and lots of print and sharing options that can be handy for creating and sharing greeting cards.