AstraChat - Direct XMPP & VOIP Client - AstraChat is a standalone and lightweight Jabber (XMPP) client application with VOIP calling that connects directly to your XMPP server without any proxies in-between.
AstraChat is always connected to your XMPP server in the background and provides you with immediate push notifications of new messages
Cheap Calls - XonXar App - Xonxar finds the cheapest rates amongst many VOIP providers and allows you to use them without subscribing with those.
Xonxar offers a simple user interface and the best price performance ratio.
Xonxar allows you to call or send sms from any point in the world and to any point in the world.
Use Xonxar at home, in the office or on the way
PhonIP Calls and Messages - PhonIP is an Android app to make free calls and send free messages over the Internet. It is provided with a user-friendly and intuitive interface. PhonIP is integrated with the SIP provider antisip.com * The PhonIP main features are : Free calls over Internet * Free messages over Internet. * Voice messages. Call to 123
Acrobits Softphone for Android is a reliable and highly customizable SIP Client for Android. It features status bar notifications, multitasking, Google Voice integration, and more.
Please note that Acrobits Softphone is a SIP Client, not a VoIP service. You must have service with a VoIP provider that supports use on a standard SIP client to use it
TeamSpeak 3 for Android - TeamSpeak is a cross-platform VoIP software, operating under a client-server architecture, that allows you to enjoy voice group chats with other users in real-time
YunGO - Cheap International Calls - YunGO will give you a possibility to do very cheap international calls worldwide. Check quality of service yourself with $0.5 initial balance, before you top up your account. Beside cheap calls you will have a lot of features in one place
Talk360 - Cheap Calls - Over 4 million people worldwide use Talk360 to stay in touch with friends and family, keep costs low on their travels or use as a back up for when their contract minutes run out
Jamisi Caller - Jamisi Caller: This Mobile dialer app lets you make cheap calls to national or international destinations. Even free call over 3G,4G and Wi-Fi network with other Jamisi network user. Save up to 60% on your mobile phone costs right away, by using the Jamisi Call now
Bondd - Bondd – connects your world for free. Create a free account with Bondd and start directly with your first free call. - At least one free call for every user every day. - Free calls include mobile, long-distance, and international destinations. - Additional calls charged only 9 cents p.m. to almost the entire world
Bria for Android Phones - Bria is a powerful VoIP softphone for Android phones. It uses a 3G or WiFi connection to make and receive calls.
Bria offers superior audio quality with the included G.711, G.722, GSM, iLBC and SILK codecs