Imo

Imo is a free chat and messaging system for your PC that allows users to send and receive messages along with voice or video calls. The application is available for most mobile devices as well, letting you communicate with others no matter where they are or what they’re doing. Imo is a good choice for anyone looking for an alternative to mainstream applications such as Skype. Along with text messages, voice, and video calls, you can send pictures or any other file type as well. The only cost you’ll pay is your internet fees.