BEST OPEN SOURCE SOFTWARE TOOLS
phpBB
OPEN SRCFlat-forum bulletin board software solution that can be used to stay in touch with a group of people or can power your entire website
FreeSWITCH
OPEN SRCScalable open source cross-platform telephony platform
Mailcow
OPEN SRCMail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration
Rocket.Chat
OPEN SRCCommunications platform that puts data protection first (alternative to Gitter.im and Slack).
Centrifugo
OPEN SRCLanguage-agnostic real-time messaging (Websocket or SockJS) server.
Druid
OPEN SRCDistributed, column-oriented, real-time analytics data store
Redash
OPEN SRCConnect and query your data sources, build dashboards to visualize data and share them with your company
Mayan EDMS
OPEN SRCElectronic document management system for your documents with preview generation, OCR, and automatic categorization among other features.
BuddyPress
OPEN SRCPowerful plugin that takes your WordPress.org powered site beyond the blog with social-network features like user profiles, activity streams, user groups, and more
Weechat
OPEN SRCFast light and extensible IRC client for the terminal
Gotenberg
OPEN SRCDeveloper-friendly API to interact with powerful tools like Chromium and LibreOffice for converting numerous document formats (HTML, Markdown, Word, Excel, etc.) into PDF files, and more
Datasette
OPEN SRCExplore and publish data with easy import and export and database management
TYPO3
OPEN SRCThe professional open source CMS for complex websites.
Pimcore
OPEN SRCMulti-channel experience and engagement management platform
Simple Machines Forum
OPEN SRCFree, professional grade software package that allows you to set up your own online community within minutes
Misskey
OPEN SRCDecentralized app-like microblogging server/SNS for the Fediverse, using the ActivityPub protocol like GNU social and Mastodon
BigBlueButton
OPEN SRCSupports real-time sharing of audio, video, slides (with whiteboard controls), chat, and the screen. Instructors can engage remote students with polling, emojis, and breakout rooms
Yeti-Switch
OPEN SRCTransit class4 softswitch(SBC) with integrated billing and routing engine and REST API.
Mailman
OPEN SRCManage electronic mail discussion and e-newsletter lists
Roundcube
OPEN SRCBrowser-based IMAP client with an application-like user interface
docker-mailserver
OPEN SRCProduction-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container. Only configuration files, no SQL database
Modoboa
OPEN SRCMail hosting and management platform including a modern and simplified web user interface
Synapse
OPEN SRCServer for [Matrix](https://matrix.org/), an open standard for decentralized persistent communication
AnyCable
OPEN SRCRealtime server for reliable two-way communication over WebSockets, Server-sent events, etc
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WHAT ARE OPEN SOURCE TOOLS?
Open-source tools are free to use, modify, and distribute. They offer maximum flexibility and transparency, with active communities driving development. Ideal for developers and organizations that want full control over their software stack.