Usermin is the open-source end-user interface from the Webmin team, served on port 20000, managing email, files, and passwords without IMAP/POP3, with low resource usage for lightweight self-service panels.
SolidCP is a free, open-source Windows hosting control panel descended from Microsoft's discontinued WebsitePanel. One panel manages multiple servers, covering websites, DNS, email, and databases, with the latest stable release 1.5.1 from December 2024.
Sandstorm is a Y Combinator-backed (2014) open-source self-hosted web app platform from the US that isolates apps with grain sandboxes and capability security, claiming to eliminate about 95% of common vulnerabilities, though commercial maintenance ended in 2020.
Created by Jeff Lindsay in 2013, Dokku is an open-source (MIT) mini PaaS built on Docker, known for git push one-click deployment and Heroku Buildpacks compatibility, ideal for self-hosted single-server application platforms.
Coolify is an open-source self-hosted PaaS from the Hungarian team coolLabs that deploys apps and databases with one click; 491,197+ self-hosted instances run 280+ one-click services.
BlueOnyx is an Italian open-source server management panel that is free with no license fees, running on AlmaLinux/RHEL with built-in email, DNS, virtual hosting, and API.
Founded in 2016, Forward Email is a fully open-source (MIT license) free email forwarding service with custom domain support. Zero ads, zero tracking, encrypted delivery, with API and SMTP relay — the go-to email forwarding solution for privacy-conscious developers.
Zen Cart is a veteran open-source PHP shopping cart released in 2003, forked from osCommerce, lightweight and free to self-host. It supports 50+ language packs and 30+ payment modules for low-cost cross-border commerce.
Spree Commerce is an open-source e-commerce platform built on Ruby on Rails, released in 2007 with 13,000+ GitHub stars. Its API-first headless architecture suits Ruby teams needing deep customization and decoupled frontends.
Founded in 2008 in the United States, nopCommerce is the most mature open-source e-commerce platform built on ASP.NET Core. Completely free, plugin-extensible, multi-store capable, with over 60,000 active installations worldwide.
Drupal Commerce is an open-source commerce module built on the Drupal CMS, released in 2008 and used by 60,000+ sites. It deeply integrates content management with commerce capabilities and supports B2B, multi-vendor marketplaces, and headless commerce.
NuGet is the official package manager for the .NET ecosystem introduced by Microsoft in 2010, with nuget.org hosting 100K+ packages and deep integration with Visual Studio and dotnet CLI.
GNU Emacs is an open-source, extensible text editor released in 1985, featuring the Emacs Lisp extension language and powerful tools like Org-mode, with cross-platform deep customization loved by developers.
Eclipse is an open source Java IDE released in 2001 by the Eclipse Foundation, with a plugin platform providing full Java development and 1,800+ Marketplace solutions for enterprise Java teams.
Atom is an open source code editor released by GitHub in 2014, built on Electron for cross-platform use, fully hackable with thousands of community packages, and officially discontinued in 2022 with a recommendation to migrate to VS Code.
FreeCamp is a 100% free, open source and self-hosted online customer service chat platform, providing live chat and basic ticketing via a website plugin. Ideal for budget-limited startups seeking private deployment.
Chatwoot is an open-source customer communication platform founded in 2017 in Mumbai, India; the MIT-licensed community edition is free to self-host, with a 6+ channel unified inbox and cloud plans from $15/agent/month as an open-source Intercom alternative.
Zulip is an open-source team chat platform created in 2012 and released under Apache 2.0 in 2015, maintained by Kandra Labs and headquartered in San Francisco, United States. Its unique Stream+Topic threaded model makes async communication efficient and orderly, with unlimited users and self-hosting on the free plan.
Wire is an end-to-end encrypted communication platform founded in Zurich, Switzerland in 2014, offering encrypted messaging, voice and video, with open-source core code and self-hosting support, adopted by German federal agencies.
Session is a decentralized end-to-end encrypted messaging app that lets you register anonymously with a 66-character Session ID and routes messages through 1000+ service nodes, a leading tool for privacy and anonymous communication.
Rocket.Chat is an open-source team communication platform initiated in 2015, offering free self-hosting, end-to-end encryption, and Matrix federation, officially serving 12M+ users and 100,000+ organizations - a Slack alternative for organizations that prioritize data sovereignty and compliance.
Jitsi is an open-source video conferencing project that began as SIP software in 2003 and is now maintained by 8x8, offering the free no-registration meet.jit.si service and fully self-hosted deployment, built on WebRTC with an end-to-end encryption option for privacy- and sovereignty-minded teams.
Wagtail is an open-source Django CMS launched by UK-based Torchbox in 2014, with 20,000+ GitHub stars. Its StreamField structured editing and multilingual workflow suit teams that prioritize content security and extensibility.
Statamic is an open-source flat-file CMS built on Laravel, originating in 2012, known for database-free, Git-friendly content management, with free Core and one-time $349 per-site Pro licensing.