Top Alternatives to X-Lite

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Linphone is a free voice over IP (VoIP) service and SIP client.

LINE is a new communication app which allows you to make free voice calls and send free messages whenever and wherever you are.

Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.

appear.in provides one-click video conferences right in your browser without requiring PIN codes or additional software.

Xabber (XMPP and Jabber) is a XMPP client for the Android Operating System.

Tango is the messaging app with the best video calling. All messages and calls are free.

Psi is a cross-platform powerful XMPP/Jabber client (Qt, C++) designed for the Jabber power users. Psi+ is a development branch of Psi IM XMPP/Jabber client.

Conversations is an open source XMPP/Jabber client for the Android platform.

Zoiper is an easy to use sip video softphone, with excellent voice quality and easy to setup.

Blink is the best real-time communications client using the SIP protocol.

Telephone allows you to make phone calls over the Internet or your company’s network.

QuteCom (WengoPhone) is a free-software SIP-compliant VoIP client.

MicroSIP is a portable SIP softphone based on the PJSIP stack available for Microsoft Windows.

Phoner and PhonerLite are softphone applications for Windows operating systems available as freeware.

YakYak is a desktop chat client for Google Hangouts.