"Flickr e-card" is an app which helps you to search images in free.
It also uses Gallery Images/ phone camera.
You can search image and make a postcard or e-card with beautiful text on it.
Easy Drag and drop feature for text on images.
Save it/share it/set as wallpaper.
Link here : https://play.google.com/store/apps/details?id=com.softcell.flickrecard