Top Alternatives to IM+

Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols.

Telegram is a free cloud-based instant messaging platform.

Adium is an Open source multi-protocol instant messaging client for Mac OS X, supports MSN, Jabber, Yahoo! and other networks.

Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.

Trillian is a proprietary multiprotocol instant messaging application.

Signal is the most scalable encryption tool.

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

Digsby provides you with IM, email and Social networks in one easy to use application.

Miranda IM is an open source multiprotocol instant messaging application, designed for Microsoft Windows.

Empathy is an instant messaging (IM) and voice over IP (VoIP) client which supports text, voice, video, file transfers, and inter-application communication over various IM protocols.

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

Psi is a free instant messaging application designed for the XMPP network (including Google Talk). Fast and lightweight, Psi is fully open-source and compatible with Windows, Linux, and Mac OS X.

Kopete is a multi-protocol, free software instant messaging client released as part of the KDE Software Compilation. Although it can run in numerous environments, it was designed for and integrates with the KDE Plasma Workspaces.

Franz is a free messaging app /former emperor of Austria, that combines chat & messaging services into one application.

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

ICQ is an open source instant messaging software.

Fring connects with Skype, MSN Messenger, ICQ and Google Talk from your iPhone.

WeChat is a social media with instant messaging, commerce and payment services application.

Kik Messenger is an instant messenger software.

Gajim is an instant messaging client for the XMPP protocol which uses the GTK+ toolkit.

Instantbird is a cross-platform instant messaging client based on Mozillas XULRunner and the open source library libpurple used in Pidgin.

iMessage is an instant messaging service.

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

Apache Spark is an open-source cluster-computing framework.

qutIM is free and open-source multiprotocol (ICQ, Jabber, Mail.Ru, IRC, VKontakte) instant messenger.

KakaoTalk (Korean: 카카오톡), or sometimes KaTalk, is a free mobile instant messaging application for smartphones with free text and free call features.

BlackBerry Messenger, also known as BBM is an instant messenger and videotelephony application included on BlackBerry devices that allows messaging and voice calls between BlackBerry, iOS, Android, and Windows Mobile users.

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.

Tencent QQ (QQ) is an instant messaging software service.

Kadu is a free and open source multi-platform instant messaging client that supports Gadu-Gadu, XMPP IM networks and other services based on XMPP like Google Talk.

Coccinella is a free and open-source cross-platform client for the XMPP/Jabber-instant messaging-protocol.

Disa is your new messaging hub. Conversations from different services can seamlessly be joined together, or disbanded within seconds.

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

Shout is a self-hosted web IRC client.

Tkabber is a GPL instant messaging client for the XMPP protocol which uses the Tk toolkit for the GUI.

YakYak is a desktop chat client for Google Hangouts.