Zoiper is described as 'IAX & SIP multilanguage and multiplatform (Windows, Linux and Mac OS X) softphone is a VoIP soft client, meant to work with any IP-based communications systems and infrastructure' and is an app in the Social & Communications category. There are more than 25 alternatives to Zoiper for a variety of platforms, including Android, Windows, iPhone, Mac and Linux. The best alternative is Jitsi, which is both free and Open Source. Other great apps like Zoiper are Jami (Free, Open Source), Wire (Free Personal, Open Source), Zulip (Free Personal, Open Source) and Linphone (Free, Open Source).
Q-municate is a cross-platform app with a wide range of communication features including free messaging, file transfer, push notifications, audio/video calls. Use instant messaging, voice or video calls features to keep in touch with friends and family. Features: