Alternatives to Whatsapp sound and voice

Handcent SMS

Program license: Free

This application is used for customization of SMS messaging and appearance

Program license: Free

Send SMS messages to friends and inside groups with the Android app

Program license: Free

Video chat and share photos securely for free

Program license: Free

This allows you to chat, send pictures, and call for free from a smartphone or computer

Program license: Free

This application allows you to turn you phone into a walkie-talkie or send instant voice messages

Program license: Free

This lets you use your mobile device to make calls and send texts, pictures, audio and video