A free app for Android, by MolasJut.

Sticker Cipung WAStickerApps is the best sticker app for WhatsApp. With this application, you can send stickers directly to your friends. All you need is to download this app and install it. You can find stickers for many different purposes, such as to send a message, to start a conversation, and more. 

The most important thing is that you can download this application for free. There are many different categories, such as Animals, Anime, Birthday, Car, Christmas, Chinese, Classic, Cool, Cup, Delicious, Easter, Emoji, Fashion, Food, Funny, Halloween, Love, Meme, Money, Musical, Nature, New Year, Office, Play, Summer, Winter, and more.