Element

Riot

Web site: element.io
Category: Network
Subcategory: Instant Messengers, VoIP
Platform: Android, iOS, Linux, OS X, Windows, Web client
License: Apache
Interface: GUI
Programing language: JavaScript, OjectiveC, Swift, Java, Kotlin
First release: 2016
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Element (previously: Vector and Riot) – a Matrix web client built using the Matrix React SDK. Matrix is an open network for secure, decentralized communication, connecting 18M+ users over 45K+ deployments.

Element is officially supported on the web in modern versions of Chrome, Firefox, and Safari. Other browsers may work, however official support is not provided.

Element has several tiers of support for different environments:
– Definition: Issues actively triaged, regressions block the release
– Last 2 major versions of Chrome, Firefox, and Safari on desktop OSes
– Latest release of official Element Desktop app on desktop OSes
– Desktop OSes means macOS, Windows, and Linux versions for desktop devices that are actively supported by the OS vendor and receive security updates

RetroShare

RetroShare

Web site: retroshare.cc
Category: Network
Subcategory: Instant Messengers, VoIP, P2P Clients, Forums
Platform: Android, Linux, OS X, Windows
License: GPL
Interface: GUI
Programing language: C++
First release: 2006
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RetroShare – an open-source peer-to-peer communication and file sharing application.

Retroshare establish encrypted connections between you and your friends to create a network of computers, and provides various distributed services on top of it: forums, channels, chat, mail… Retroshare is fully decentralized, and designed to provide maximum security and anonymity to its users beyond direct friends. Retroshare is entirely free and open-source software. It is available on Android, Linux, MacOS and Windows.

Features:
– Chat – Send text and images. Discuss with various people in chat rooms. Express your emotions with the rich smiley set. Use distant chat to securely chat with friends-of-friends.
– Voice and Video – Make free and secure calls with the VoIP plugin. Catch up face to face with a video call.
– Mail – Send encrypted messages to other members of the network. Retroshare can store encrypted messages on friends nodes to deliver messages while you’re offline.
– File sharing – Share files with your friends or with the whole network. Use the search to find files. Retroshare uses swarming similar to BitTorrent, to accelerate the download. This makes it possible to share big files with 1GB or more. Your privacy is protected with anonymous tunnels. Only your direct friends might learn which files you download.
– Forums – you can read and write forum posts offline. This is perfect while you’re on the go. When you have an Internet connection, Retroshare will automatically sync forums with your friends. Decentralized forums are censorship resistant by design.
– Posted – Share your favorite links. See which links others like. Vote and discuss links.
– Channels – Publish files in channels. Subscribe to channels and automatically download the latest files. Comment on files and spread them to your friends.
– Protect your IP with Tor/I2P – Need to hide from Internet surveillance? Can’t connect to your friends because of censorship? Need to bypass nasty firewalls? Use Retroshare over Tor to hide the connection between you and your friends.

Threema

Threema

Web site: threema.ch
Category: Network
Subcategory: VoIP Clients, IM
Platform: Android, iOS, Web client
License: AGPL, MIT
Interface: GUI
Programing language: C, Objective-C, Java
First release: December 2012
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Threema – a secure messenger which keeps your data out of the hands of hackers, corporations, and governments. Threema can be used completely anonymously, allows to make end-to-end encrypted voice and video calls, and offers every feature one would expect from a state-of-the-art instant messenger. With Threema Web, you can also use Threema from your Desktop.

Features:
– Text and Voice Messages – Quickly and conveniently send text messages. If you don’t have the time to type, voice messages come in handy.
– Groups and Distribution Lists – Groups and distribution lists allow to send messages to multiple recipients at once. Groups are managed in a strictly decentralized manner. Except the group members themselves, no one – not even Threema – knows who is member of a group.
– Threema Web: Conveniently Chat from the Desktop – Thanks to Threema Web, chatting from the desktop is just as secure as using the Threema app on your phone. You have full access to your entire chat history as well as all contacts and media files. Threema Web is open source.
– Share Files, Media, and Locations – Use Threema to send any type of file. Just like text messages, files are end-to-end encrypted, of course.
– Handy Poll Feature – Create polls in no time to gather the other group members’ opinions in an efficient manner.
– Voice and Video Calls – Place calls without revealing your phone number. Threema calls are end-to-end encrypted and thus tap-proof. They impress with crystal-clear voice quality and brilliant video quality.

Threema is developed by the Swiss company Threema GmbH.

Silent Circle

Silent Circle

Web site: silentcircle.com/products-and-solutions/silent-phone/
Category: Network
Subcategory: VoIP Clients
Platform: Android, iOS
License: Proprietary
Interface: GUI
Programing language: ?
First release: 2012
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Silent Circle – an end-to-end encrypted voice, video, messaging, file transfer, and more VoIP application software. Silent Phone makes sure your conversations are 100% private and that you’re connected only to your intended party. All encryption is done on device. Silent Phone is easy to deploy and manage in an enterprise environment. It requires no end-user training. It supports SSO, SIEM systems, and can be deployed via MDM.

Features:
– It hosts a global network of servers to make sure that your calls connect wherever you are.
– Silent Phone’s powerful Security Words let you verify your own security.
– Handle multiple calls at once with ease. Silent Phone shows you all your calls in one place.
– Hear and be heard clearly with Silent Phone’s HD quality voice and video.
– Messages you send are automatically deleted on all devices after the burn timer has expired.
– You can select a message for immediate destruction at any time.
– Silent Phone makes it quick and easy to record and send a voice memo.
– Most conference calling products mix the conference audio in the cloud, risking your secrets. Silent Phone mixes the conference on device.
– Keep everyone in the loop by creating a secure text channel with your entire team.
– Call or message your team members directly from the contacts app on your phone.

Linkus

Linkus

Web site: yeastar.com/unified-communications/linkus-softphone/
Category: Network
Subcategory: VoIP Clients
Platform: Android, iOS, OS X, Windows
License: Freeware, Proprietary
Interface: GUI
Programing language: ?
First release: 2006
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Linkus – a VoIP client software available for Android and iOS mobile devices, and Windows and OS X as desktop applications. With Linkus Softphone App, all the features of a desk phone can be realized by your mobile device and desktop.

Features:
– Make and receive enterprise VoIP calls over your Wi-Fi or mobile data networks to lower mobile voice charges
– One number reach to conceal your personal mobile phone number and ensure unified corporate identity
– Set up flexible ring strategy for Linkus and the desktop phone
– Select different outbound routes for different destinations (local/long-distance/international, etc.)
– Corporate directory integration with lookup and visual status indicator (available/unavailable/busy)
– Configurable PBX features including Call Transfer, Call Forwarding, Call Waiting, DND, and Ring Timeout
– Support Push Notifications to alert users of incoming calls while conserving energy

Tango

Tango

Web site: tango.me
Category: Network
Subcategory: VoIP Clients
Platform: Android, iOS
License: Proprietary
Interface: GUI
Programing language: ?
First release: 2009 ?
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Tango – a messaging platform developed by TangoME, Inc. which was founded in September 2009 by Uri Raz and Eric Setton. It lets you make video calls, voice calls, texting, photo sharing, and games.

It can be managed via application on Android, iOS or via a web browser.

Sipdroid

Sipdroid

Web site: sipdroid.org
Category: Network
Subcategory: VoIP Clients
Platform: Android
License: GPL
Interface: GUI
Programing language: C
First release: April 27, 2009
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Sipdroid – a free and open source SIP/VoIP client for Android devices, developed by the i-p-tel GmbH. The project started in March 12, 2009 by the project author Dr. Pascal Merle.

The app routes calls dialed from your phone’s built-in contacts app to VoIP. In settings you can choose when to use VoIP and when to make standard phone calls, based on being logged in to Wifi, and/or based on number prefixes.

Features:
– Two SIP accounts can be used simultaneously
– Supports STUN for users behind Network address translation (NAT)
– Video calls (limited support)

LINE

LINE

Web site: line.me
Category: Network
Subcategory: VoIP Clients, Instant Messengers
Platform: Android, iOS, Windows, Web (chrome extension)
License: Freeware, Proprietary
Interface: GUI
Programing language: ?
First release: March 2012
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LINE – a free messaging, convenient memos, and screen capture made easy LINE reshapes communication around the globe, allowing you to enjoy free messaging wherever you find yourself. LINE is available for a variety of smartphone devices (iPhone, Android, Windows Phone, BlackBerry, and Nokia) and even your PC.

Features:
– Send free one-on-one and group texts to your friends anytime, anywhere.
– Free international voice and video calls make it easy to stay connected.
– Share exactly how you’re feeling by choosing from over 10,000 stickers and emoticons.
– LINE lets you share photos, videos, voice messages, contacts, and location information in the moment.
– Follow the official accounts of your favorite artists, celebrities, brands, and TV shows for exclusive news, promotions, and more.
– Exchange stories with your close friends by sharing texts, photos, videos, and stickers on your Timeline.
– Save your favorite messages, photos, and videos in Keep. Save time finding files and easily share your stuff with friends.
– Quickly add friends using the “Shake It!” function, a QR code, or a LINE ID.
– Share unforgettable moments directly from chats via live video.
– Make your chats even better with cute filters and effects.
– Play free Face Play games with a friend from a video call or chat.
– Share screenshots from the game in chats or on Timeline and other social media.
– Check out LINE TODAY for the latest news on current events, sports, and entertainment. Plus, find videos, live broadcasts, fun community content, and much more.
– OpenChat is an online space where you can meet new friends with similar interests and share fun news and information. (Available only in Indonesia, Japan, Taiwan, and Thailand.)

Google Duo

Google Duo

Web site: duo.google.com
Category: Network
Subcategory: VoIP Clients
Platform: Android, iOS, Web
License: Freeware, Proprietary
Interface: GUI
Programing language: ?
First release: August 16, 2016
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Google Duo – a high quality video calling application. It’s simple, reliable, and works across Android and iOS phones and tablets, smart devices, and on the web. Google Duo replaced Google Hangouts applications.

Features:
– Make calls between Android and iOS – Whether you’re on your phone, tablet, or on the web, you can stay in touch with Duo.
– Group call with up to 12 people – Bring together all the people who matter most, even when you’re apart, with group calling. Duo now supports 12 people in group video calls.
– Send video and voice messages, photos, and more – Short on time or your friends can’t pick up? Leave a personalized video message with fun effects, or share voice messages, photos, notes, and emojis.
– Low Light Mode – Duo lets you make video calls even in poor lighting conditions.
– Voice calling -Make voice-only calls to your friends when you can’t chat over video.

Cloud Softphone

Cloud Softphone

Web site: cloudsoftphone.com
Category: Network
Subcategory: VoIP Clients
Platform: Android, iOS
License: Proprietary
Interface: GUI
Programing language: ?
First release: 2008 ?
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Cloud Softphone – a B2B UCaaS platform that lets you implement advanced front-end functionality into your existing phones, mobile devices, and web browsers. The application is developed by Acrobits, a privately owned software development company, based in Prague, Czech Republic.

Features:
– Cloud Softphone seamlessly supports the major Class 5 platforms available.
– Cloud Softphone lets you deliver infinite provisioning methods that encompasses high security standards and automation through credentials, QR codes, and mobile phone numbers using: Google OAuth 2.0, MSISDN, Credentials, Office365, QR Code.
– High-quality communications start with Cloud Softphone. Offer crystal-clear calling, texting, and video chatting that takes advantage of the latest audio and video codecs.
– Native Mobile and webRTC Support. Deliver more than just a mobile experience. Cloud Softphone supports desktop operating systems like Mac OS X and Windows and many of the most popular browsers.
– Cloud Softphone can automatically upload your smartphone contacts, detect web phone numbers, and act as a click to call tool.