The best free alternative to Redact is Signal, which is also Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Redact and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Redact are Telegram, Discord, Tox and Mumble.
QuteCom is a community of enthusiasts and developers, creating free software products related to communication over IP. The flagship product of the QuteCom project is a softphone which allows you to make free PC to PC video and voice calls, and to integrate all your IM contacts...
Small program mainly aimed to provide a simple user interface for making VoIP calls with Asterisk PBX (an open source VoIP PBX).
Unlimited free calls anywhere in North America!
KNCTR gives you the ability to stay connected with the people that matter most. Call any mobile or landline phone number across North America, absolutely FREE! All you need is a headset plugged into your computer, an Internet conne.
Tkabber is a Free and Open Source client for the Jabber instant messaging system. Its writen in Tcl/Tk, and works on many platforms (tested on Linux, FreeBSD, NetBSD, Solaris, MacOS X and Windows 98/2000/XP).
Encryption plugin for Pidgin, providing up to 4096 bit RSA encryption using the NSS crypto library from Mozilla. Keys are automatically transmitted and stored, making it very easy to use, but also resistant to man-in-the-middle attacks.
GoldBug is a secure Instant Messenger. You can be sure with using GoldBug (GB), that no third party can look into your chat communication. Private user-to-user communication remains private. GoldBug therefore uses strong multi-encryption with different layers of modern...
Extremely low bandwidth video collaboration software that supports application sharing, desktop sharing, file sharing, and PTZ camera control. Also, this client is free without support for commercial, personal, and government use.
Pinger lets you text and talk free with the people you care about most, anywhere on the planet. Tap a picture and you'll see all of your communications—texts, pics, calls, voicemails—all in one place.
Instant messaging with voice and video options, live group video chat for up to 10 participants, public and private rooms, interest communities, mobile and desktop access, user-created rooms, moderation tools, and options for anonymous participation.
SureSpot is an open source encrypted messenger designed to make encrypted messaging simple and accessible to anyone.
ÜberConference is the easiest and best way to make conference calls. Simply choose contacts from your address book and your conference will be created instantly. Participants don't even need to call in, as they will be dialed and/or sent an email invite to join.
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