Chat with several friends at one time with Hangouts.
It's like having all of your contacts in one place while talking to each other with this fun app. You receive notifications immediately when someone sends a message or shares information, such as a picture or a video, so that you'll be the first to see.
Handcent SMS is an awesome, free Android app, being part of the category Communication Apps with subcategory SMS & IM.
imo was originally a messaging app that could manage a lot of different social networks and chat apps.
Google Allo is a free messaging app from Google, designed for smartphones.
Fun for the first five minutes Kong is an app that helps you create reaction gifs selfies.
Messenger from Google is a standalone app to send SMS and MMS to any phone.
The Serval Mesh is a free app for Android that belongs to the category Communication, and has been developed by Serval Project.