Open-source cloud applications

WordPress.com is a web building platform for self-publishing that is popular for blogging and other works. It is owned and operated by Automattic, Inc. It is run on a modified version of the WordPress software. This website provides free blog hosting for registered users and is financially supported via paid upgrades, "VIP" services and advertising.

Mattermost is an open-source, self-hostable online chat service with file sharing, search, and third-party application integrations. It is designed as an internal chat for organisations and companies, and mostly markets itself as an open-source alternative to Slack and Microsoft Teams.

Jellyfin is a free and open-source media server and suite of multimedia applications designed to organize, manage, and share digital media files to networked devices. Jellyfin consists of a server application installed on a machine running Linux, Microsoft Windows, or macOS; and another application running on a client device such as a smartphone, tablet, smart TV, streaming media player, game console or in a web browser. Jellyfin also can serve media to DLNA and Chromecast-enabled devices. It is a fork of Emby.

open source online office suite