Multiplayer game servers and browser games.

Simplified file servers for sharing of one-time/short-lived/temporary files, providing single-click or drag-and-drop updload functionality.

Peer-to-peer file sharing is the distribution and sharing of digital media using peer-to-peer (P2P) networking technology.

Object storage is a computer data storage that manages data as objects, as opposed to other storage architectures like file systems which manages data as a file hierarchy,…

Network distributed filesystems.

File transfer, sharing and synchronization software software.

A news aggregator, also termed a feed aggregator, feed reader, news reader, RSS reader, is an application that aggregates web content such as newspapers/blogs/vlogs/podcasts in one location for easy viewing.

Federated identity and authentication software.

E-commerce software.

An integrated library system is an enterprise resource planning system for a library, used to track items owned, orders made, bills paid, and patrons who have borrowed.

Institutional repository and digital library management software.

Ebook library management software.

A document management system (DMS) is a system used to receive, track, manage and store documents and reduce paper.

DNS servers and management tools.

Web interfaces for database management. Includes tools for database analytics and visualization.

Content Management Systems offer a practical way to setup a website with many features, using third party plugins, themes and functionality that are easy to add and customize.

Software for submission of abstracts and preparation/management of academic conferences.

Management and administration tools for community supported agriculture and food cooperatives.

To enable JMX (Java Management Extensions) in Apache Tomcat on a Windows system, you can follow these step-by-step instructions: Sample

Extensible Messaging and Presence Protocol Web clients/interfaces.

Extensible Messaging and Presence Protocol servers.

Video/Web Conferencing tools and software.

Social Networking and Forum software. Akkoma – Federated microblogging server with Mastodon, GNU social, and ActivityPub compatibility. AGPL-3.0 ElixirAnahita – Open Source Social Networking Framework and Platform….

SIP/IPBX telephony software. Asterisk – Easy to use but advanced IP PBX system, VoIP gateway and conference server. GPL-2.0 CASTPP – VoIP Billing Solution for Freeswitch. It…

IRC communication software. Convos – Always online web IRC client. Artistic-2.0 PerlErgo – Modern IRCv3 server written in Go, combining the features of an ircd, a services…

Webmail clients. Cypht – Feed reader for your email accounts. LGPL-2.1 PHPIMP – HORDE application that provides webmail access to IMAP and POP3 accounts. GPL-2.0 PHPMailCare –…

Mailing list servers and mass mailing software – one message to many recipients. Dada Mail – Web-based list management system that can be used for announcement lists…

Mail Transfer Agents (MTAs) – SMTP servers. chasquid – SMTP (email) server with a focus on simplicity, security, and ease of operation. Apache-2.0 GoCourier MTA – Fast,…

Mail Delivery Agents (MDAs) – IMAP/POP3 server software. Cyrus IMAP – Email (IMAP/POP3), contacts and calendar server. BSD-3-Clause-Attribution CDovecot – IMAP and POP3 server written primarily with…