Free Communication Software
Omegle
Omegle is a video chat application that randomly connects you with other people for a one-to-one conversation. When using Omegle, you will automatically be paired with another person across the global, and can cancle that connection at any time to re-join a new conversation. Omegle is a great way to meet new people, randomly.
bbPress
bbPress is forum software from the creators of WordPress. With bbPress you can quickly setup a forum for asyncronous discussion and subscriptions for your WordPress-powered site.
ChatHub
ChatHub is a good alternative to Omegle. With ChatHub you can video chat with random people from all across the globe. It provides features for text and video chat communication and is free to use.
Element
Element is an All-in-one secure chat app for teams, friends and organisations that allow you to own your conversations. With Element you can keep conversations in your control, safe from data-mining and ads. Element utilize the open and global Matrix network for message relay, protected by proven end-to-end encryption.
Facebook Messenger
Facebook Messenger is a free standalone chat application that is well integrated with the social network, Facebook. With Facebook Messenger you can stay in contact with friends and family, and other contacts from Facebook. The applicaiton has a ton of built-in features that make communication fun and engaging. Send images, gifs, video messages, voice notes, and stickers or share content from around the web. Facebook Messenger automatically syncs with your Facebook contacts without the need of adding phone numbers or identification manually.
Gitter
Gitter is an open-source instant messaging and chat room system for developers designed to make community messaging, collaboration and discovery as smooth and simple as possible. Gitter is provided as software-as-a-service and integrates with GitLab and GitHub repositories to make discussion around code even easier. With Gitter, you can can easily create, organise and grow your communities, inviting others to join just in one click. Over 1.5M users across 100K communities use Gitter to discuss code and development progress.
Bumble
Bumble is an application that empowers people to connect with confidence whether it be for dating, networking, or meeting friends online. Bumble uses location-based and interest-based metrics to connect you with similar people in your area. In heterosexual matches, only female users can make the first contact with matched male users, while in same-sex matches either person can send a message first.
Mailpile
Mailpile is an effort to reclaim private communication on the Internet. A project to rescue our personal lives from the proprietary cloud and prevent our conversations from being strip-mined for corporate profit and government surveillance. With Mailpile you can take e-mail back and make it yours.