R&Q is a little instant messaging client for the ICQ protocol, fork of Rejetto's &RQ. It is simple, fast, takes a little more than 1 MB disk space and doesn't need setup.
Chatzy is a free private chat service which you can use to communicate with people you already know or people who visits your blog or website. With Chatzy you can create a chatroom and send out email invitations very quickly and easily. No registration is required.
AtomJump.com is a well tuned hosted version of the free open-source AtomJump.org. It is free to chat publicly with your family, group or co-workers on your own group.
Cost / License
- Free
- Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- iPad


+3
Winpopup LAN Messenger is a cost-effective Office, Corporate, Enterprise Instant Messaging solution.


Stackfield is a Slack-alternative for chat, collaboration, calendaring and file-sharing. It enables encrypted chatting (end-to-end encryption) and is hosted in Germany.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Online


+1
AQQ is a Polish (but available in English) multiprotocol instant messenger with support of: AQQ, Jabber, Gadu-Gadu, Tlen and ICQ. It has many great features like: one tabbed message window for all conversations; quick search for contacts; file sending (even through FTP thanks to...



Voptop offers secure and anonymous telephony, instant messaging, file transfer and screen sharing/recording. The Voptop-network is a “peer to peer”-network, which is built by using all registered voptop clients.


Webex Teams is an app for continuous teamwork with video meetings, messaging, file sharing and white boarding.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Windows
- Android
- iPhone
- Android Tablet
- iPad



Coco Voice is a Walkie Talkie app to share voice, text, and pictures.
- VOICE, TEXT & PHOTO messages
- Completely FREE with no annoying advertisements
- 1-Click sign-in with Facebook
- Group chats
- Publish your voice on Facebook or Twitter
- Supports WiFi, 3G and any oth.
Cost / License
- Free
- Proprietary
Application types
Platforms
- Android
- iPhone
- iPad


+2
Cost / License
- Free
- Proprietary
Application types
Platforms
- Windows
- iPhone
- iPad


+3
Collaboration app for teams of all sizes. Hubgets makes team knowledge instantly available through chat, voice and video. Fast results, fewer interruptions, more transparency, stronger teamwork.
Cost / License
- Paid
- Proprietary
Application types
Platforms
- Mac
- Windows
- Online


+3
A beautiful, free, easy-to-use chat (instant messaging) application for the XMPP protocol (Jabber, Google Talk). Project has been discontinued, though source code is still available on website
FBMessenger is a stand-alone Facebook Messenger app for Linux, very similar to the official Messenger for Windows.


Team.biz is a messaging service for companies, teams, and professionals. Team administration, group messaging, add guests, text (SMS and MMS), open and private topics, drag & drop image and doc sharing, edit messages, view message history, and more.
Cost / License
- Free
- Proprietary
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Chrome OS
- Android Tablet
- Windows Phone
- iPad
- Xbox


+7
KMess is the Live Messenger alternative for Linux, aiming at integration with the KDE desktop environment.



YAATA is influenced by the true spirit of Android. It is a SMS/MMS app that has so much to offer. You can personalize and configure this app to your definition of the perfect app. YAATA SMS is very powerful, reliable and the speed of the app is on another level.


+2
A simple-to-use messaging app for 1:1 communication and small groups supporting SMS, MMS, matrix and XMPP through libpurple.

Stay in touch with your friends right from your desktop, with fTalk – FREE chat messenger for your desktop With many features:


YateClient is a free Voip Client (SIP / IAX / GVoice) and Instant Messenger (Facebook / GTalk / Jabber), with it you're permanently connected on multiple chat and telephony accounts.
Cost / License
- Free
- Proprietary
Application type
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux





+2
A Collaboration workspace that acts as a virtual office for remote workers and distributed teams. Provides features like chat, voice channels, screen sharing, meeting rooms & task management and more.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Online



At work, more than ever, we need a place to bring everyone together and help each person succeed. That’s Jostle. The employee success platform.
Cost / License
- Paid
- Proprietary
Application types
Platforms
- Online
- Android
- iPhone
The #1 Video chat plugin that will turn your website into a fully featured virtual office in minutes with: Video-calls, screen sharing, appointment scheduling, text-chat, whatsapp, Facebook messenger, site analytics and more….
Cost / License
- Paid
- Proprietary
Application types
Platforms
- Mac
- Windows
- Online
- Android
- iPhone
- Chrome OS
- Android Tablet
- iPad


+1
Umnico is the omnichannel messaging solution and the ultimate tool for managing customer communications. With support for over 25 business messengers and social media platforms, all accessible from one central chat-center, you can streamline your customer interactions like never...
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Android
- iPhone
- iPad
- Software as a Service (SaaS)



Sipnetic is a free VoIP softphone based on the SIP protocol. Sipnetic supports voice and video calls, instant messages, presence information and end-to-end encryption.
Cost / License
- Freemium
- Proprietary
Application types
Platforms
- Android


+3














































