A free app for Android, by PEEKABOO.

Lite Messenger is the fastest messenger with a great user experience. Its speed and stability make it the perfect alternative for Facebook Messenger, Whatsapp, and other chatting apps that require too much data or bandwidth. Lite Messenger works on WiFi or an internet connection. It is a free, fast, and fully customizable lite alternative for both Facebook Messenger and lite that allows you to chat with your friends and family on Facebook. It has similar features as Facebook lite and messenger but without aggressive advertisements and large file size. With this new theme, you can make your messenger different from others in a very short time if you are not satisfied with the current design of your Facebook Messenger.