If you have ever received an email with an attachment that you need to put your signature on, you need to check out Hello Sign. Hello Sign is a free service that allow you to digitally sign documents. Hello Sign can be used on your computer, on your iPhone, and on your iPad.
On your iPhone or iPad you can use Hello Sign by selecting a document or by taking a picture of a document. I have demonstrated the app to many people over the last year and everyone has been impressed by how easy it is to use. I just open the app, log into my Hello Sign account, and snap a picture of a document. After the picture was captured I have the option to apply a stored signature or sign the document using my finger on my iPad screen.