A free program for Android, by Алия Гайнетдинова.

Spice up the look of your device without changing your wallpaper or theme. Photo widget is a simple application that lets you use any photo as a widget. With this app, you can select any photo from your gallery and display it on your home screen. Display the phot of your kid, family or even your pets so you can quickly see their smiles as you open your mobile device. And since the widget is resizeable, you can adjust the photo and add more widgets that you prefer.  

Photo Widget application is free and works with Android 4.0 and above.