Free Communication Software
Vanilla
Create an online community that your customers will love. Vanilla's forum software is used by top brands to engage customers, drive loyalty and reduce support costs. The software is provided free and open-source as a self-hosted solution and can be bought by businesses and enterprises as a managed and hosted solution.
Shagle
Shagle is a free video chat platform that connects people randomly for one-to-one conversations. It makes it quick and simple to meet new strangers online. Shagle provides filter that makes it easy to find girls, guys and couples on webcam and establish genuine and lasting connections.
Facebook
Facebook is the most popular social networking platform in the world. Over 2.6 billion people across the globe use the platform to share photos, post status updates and communicate with friends. Facebook can be accessed from your browser or through their mobile applications available for Android, iOS and Blackberry.
Meetup
With Meetup you can discover the things you love and meetup with people with similar interest online or in person. People use Meetup to build a career network, share interests and ideas in communities and create personal brands and social awreness around topics. Anyone can create events with Meetup and expand their network and knowledge with the help of others. The Meetup app is avalible in your web browser and for Android and iOS.
ResearchGate
With ResearchGate you can discover scientific knowledge and connect with your peers from anywhere. The application allow you to keep up with the latest research in your field and choose what you want to read later. You can also message peers directly from your mobile and keep up with with your stats, including reads, recommendations, and citations of your work. ResearchGate is a professional network for scientists and researchers tailored to professional communication.
Flarum
A free and open-source modern forum software written in PHP. With Flarum you can eaisly setup your own discussion froum and host it online.
Liveeds
Liveeds is a live video chat service that provides easily accessible video chats. With the a simple click you can activate your webcam and start live cam to cam chat in real time from all over the world without creating an account. Liveeds allow you to video chat with people of the opposite sex through chat roulette utilizing the latest video streaming technology.
Simple Machines Forum
Simple Machines Forum or SMF in short is a free and open-source forum software. SMF can be used to build your own online community that you self-host on a host of your choice. Simple Machines Forum comes packed with features for customization, extension and management of your community. The template engine puts you in control of the design of your community. The plugin architecture makes it easy to extend and provide further feautres though third-party built packages.
Upvotocracy
Upvotocracy zero-moderation social sharing service similar to Reddit. With Upvotocracy you can earn Karma that will be paidout in Bitcoin's satoshi denomination. Upvotocracy is a free and open-source software built with Node.js, Express, MongoDB, Mongoose and Svelte.
StumbleUpon
StumbleUpon was a popular content and website discovery platform that discontinued its operation in June 2018. With StumbleUpon, users could enjoy fresh websites and content delivered to them at random or by randomly by category, or randomly by user preference. In 2019 the creators of StumbleUpon created a new content-based discovery platform called Mix.