Signal sends high-quality group, text, voice, video, document, and picture messages anywhere in the world. Signal messages and calls are always end-to-end encrypted and painstakingly engineered to keep your communication safe. 

Signal - Secure Messaging

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle. It is as an alternative to proprietary SaaS messaging, Mattermost brings all your team communication into one place, making it searchable and accessible anywhere. 
 
Mattermost is the only all-in-one solution for developers to collaborate without sacrificing security. Its integrated platform is designed around Channel-based collaboration that connects your people, processes, and tools. Kanban-style Boards make managing projects easier than ever, while Playbooks provide prescribed workflows that drive reliable and repeatable outcomes based on your team’s processes.

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle. It is as an alternative to proprietary SaaS messaging, Mattermost brings all your team communication into one place, making it searchable and accessible anywhere. 



Mattermost - Self-hosted Team Communication Service

Zulip is a powerful, open source group chat application. It supports both private messaging and group chats via conversation streams. Zulip also supports fast search, drag-and-drop file uploads, image previews, group private messages, audible notifications, missed-message emails, desktop apps, and much more.

Zulip - Group Chat

BigBlueButton is an open source web conferencing system for distance education. 

It supports sharing of slides (PDF and any document readable by OpenOffice), webcams, whiteboard, chat, voice over IP (using FreeSWITCH), and presenter's desktop. It can record and playback sessions (slides, audio, and chat), runs on Mac, Unix, and PC computers, and is supported by a community of developers that care about good design and a streamlined user experience. 

 
The use cases for BigBlueButton are One-to-one on-line tutoring, Small group collaboration, 
On-line classes (25 or less)

BigBlueButton is an open source web conferencing system for distance education. It supports sharing of slides (PDF and any document readable by OpenOffice), webcams, whiteboard, chat, voice over IP (using FreeSWITCH), and presenter's desktop. It can record and playback sessions (slides, audio, and chat), runs on Mac, Unix, and PC computers, and is supported by a community of developers that care about good design and a streamlined user experience. 



Bigbluebutton - Open Source Web Conferencing

Kopano Core provides the foundation for groupware messaging enabling clients such as Kopano WebApp, Kopano DeskApp, mobile and sync clients. With its modular architecture, Kopano Core enables the possibility for a variety of setup scenarios, scalable from a very low-powered system to a multi-datacenter setup providing messaging capabilities to tens of thousands of users.
 
Kopano Core provides all traditional groupware functionality with e-mail, advanced calendaring, contacts, tasks and notes. With full support for ACLs, public folders, delegation, enterprise search and much more, Kopano Core is perfectly suited for usage as messaging platform with professional needs in communication. The native implementation of MAPI allows conversion-less interoperability providing its rich feature-set to a broad range of clients, including mobile integration.

Kopano Core provides the foundation for groupware messaging enabling clients such as Kopano WebApp, Kopano DeskApp, mobile and sync clients. With its modular architecture, Kopano Core enables the possibility for a variety of setup scenarios, scalable from a very low-powered system to a multi-datacenter setup providing messaging capabilities to tens of thousands of users.

Kopano - Collaboration made easy

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Projects

Signal - Secure Messaging

Mattermost - Self-hosted Team Communication Service

Zulip - Group Chat

Bigbluebutton - Open Source Web Conferencing

Kopano - Collaboration made easy

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Projects

Signal - Secure Messaging

Mattermost - Self-hosted Team Communication Service

Zulip - Group Chat

Bigbluebutton - Open Source Web Conferencing

Kopano - Collaboration made easy

TechStack

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