A free program for Android, by Floc Media.

Add Emoji Stickers – Pics Editor & Photo Maker is an amazing app that lets you add text, stickers, and emojis to your photos. You can choose from the available stickers, emojis, and backgrounds. You can also change the color of the text and background. All you need to do is to take a photo or select one from your gallery, and then you can edit it. You can change the angle of the photo, rotate it, and use the brush to get the tiniest details. After that, you can choose from a variety of backgrounds and add text. You can also change the font and size of the text. After you are done editing, you can save the picture in the gallery of your phone.