A free program for Android, by batter man.

Collage Maker – Photo Collage is the best collage maker and photo editor app for Android phones and tablets. It can help you combine several photos into a single photo, crop and resize them, add text, stickers, and backgrounds, adjust the brightness, saturation, and contrast, and then share it on Instagram, Facebook, Snapchat, Twitter, and many other social networks.

It is easy to use, even for beginners. Just select several pictures, pick a layout, and you are done. You can also use it to edit your photos, crop and resize them, add text, stickers, and backgrounds, adjust the brightness, saturation, and contrast, and then share it on Instagram, Facebook, Snapchat, Twitter, and many other social networks.