ReadWriteThink: Postcard Creator and app

From site: 

The Postcard Creator helps students learn to identify all the typical parts of a postcard, and then generate their own postcard messages by typing information into letter templates. Students follow the steps and fill in the address, details on the postcard’s artwork, and the postcard message. The finished postcard can then be previewed, edited, and printed. After printing their texts, students can illustrate the front of their postcards in a variety of ways, including drawing a picture, creating a collage of images found online and in print resources, or printing and pasting clipart in place. The tool is easy to use, made even easier with the Postcard Planning Sheet, a printable PDF that students can use to draft and revise their work before creating and printing their final postcards on the computer.

The Postcard Creator is also available for iPad/iPhone and Android devices.