1. Chomp SMS - is a free text messaging app for Android. The app enables you to choose among hundreds of themes and skins, and use features like a passcode app lock, privacy options, a scheduled SMS sender, blocking features, signatures, a quick-reply popup, dual SIM support, and group messaging. You can customize notification icons, LED colors, ringtones, vibrate patterns, screen colors, font types and sizes, and background wallpapers. It’s also compatible with Yappy, Pushbullet, and MightyText for desktop notifications and replying.
2. GO SMS - is a fun Android app for sending free text messages. The app features themes, stickers, pop-up windows, the ability to send free SMS and MMS, and dual-SIM support. There’s even a “private box” to encrypt messages and protect your privacy, the ability to stick conversations to the top of the app, and you can pop up messages for quick viewing and replying.
3. Handcent - enables you to send free text messages via Wi-Fi or data on iPhone, Android, or Windows Phone. You can even use the app on your computer or tablet so that you can send messages even when you don’t want to type on the small keyboard of your smartphone. And if you have more than one phone number, you can use Handcent to switch between numbers.
4. MightyText - enables you to send free text messages from your computer, synced with your Android phone and your phone number. The app enables you to send and receive SMS and MMS from your computer or tablet, and get notifications from your phone on your computer. You can also schedule messages to be sent in the future, get phone battery alerts, send web pages or maps or photos to your phone, and text directly from Gmail. MightyText is available on Android, as well as in a desktop and web app.
5. mySMS - enables you to send and receive free text messages from your computer or tablet, just like you would on your phone. The app uses your existing phone number and sends texts via your Android phone. All messages are encrypted and saved securely in the cloud, and you can choose to send free messages to other mySMS users or opt to text via your carrier. The app is available on the web, for Windows 8 or 10, on the iPad or Android tablets, or on Android phones.
6. QKSMS - is a free, open-source Android app for sending free text messages. The app follows Google’s Material Design guidelines for a sleek and attractive interface and features nearly 200 themes so that you can customize the look. You can send free SMS and MMS, create group messages, use the delayed messaging feature, take advantage of the app’s Android Wear support, or search your messages.