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FreeBSD is a free and open-source Unix-like operating system descended from the Berkeley Software Distribution (BSD), a version of Unix developed at the University of California, Berkeley. The project began in 1993 as an outgrowth of 386BSD and released FreeBSD 1.0 later that year. It is developed as a complete operating system, with the kernel, device drivers, userland utilities, build system and documentation maintained in a single source tree.
FreeBSD is best known for server, networking, storage and embedded-system use. Its project documentation describes TCP/IP networking, OpenZFS, security features, documentation, a unified build system, and the ability to install third-party software through binary packages or the FreeBSD Ports collection. FreeBSD is also used as the basis for products and services including the Netflix Open Connect content-delivery network and the pfSense firewall and router distribution.
The FreeBSD Project is governed by elected committers and a Core Team, while the FreeBSD Foundation supports development, advocacy, infrastructure and legal matters. Code from FreeBSD has been incorporated into other operating systems, including Darwin (the basis for macOS, iOS, iPadOS, watchOS and tvOS), TrueNAS, and the system software for the PlayStation 3, PlayStation 4, PlayStation 5 and PlayStation Vita consoles.
The current major production branch is FreeBSD 15, first released as 15.0 on 2 December 2025; FreeBSD 14 remains a supported production branch, with 14.4 released on 10 March 2026. FreeBSD source code is generally distributed under the permissive two-clause BSD license, which permits both open-source reuse and inclusion in proprietary products; individual components may use other open-source licenses.
“There’s more to keeping FreeBSD free than meets the eye. They work hard behind the scenes and you hardly ever see them. They’re The FreeBSD Foundation and they quietly fund and manage projects, sponsor FreeBSD events, Developer Summits and provide travel grants to FreeBSD developers. The FreeBSD Foundation represents the FreeBSD Project in executing contracts, FreeBSD license agreements, FreeBSD copyrights, FreeBSD trademarks, and other legal arrangements that require a recognized legal entity. The Foundation’s funding and management expertise is essential to keep FreeBSD free. And keeping it free is getting more costly every year. That’s why they need your help. The work of The FreeBSD Foundation is entirely supported by your generous donations.” (AbFrBSD 2018)
To make a donation visit their web site at: https://FreeBSDfoundation.org
Please, help them today. Help keep FreeBSD free.
The FreeBSD Foundation P.O. Box 20247, Boulder, CO 80308, USA Phone: +1-720-207-5142 Fax: +720-222-2350 Web: https://FreeBsdFoundation.org
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FreeBSD: FreeBSD Fundamentals, FreeBSD Inventor: Bob Fabry, Keith Bostic on November 1, 1993 (Also involved: William Jolitz, Lynne Jolitz (386BSD also known as Jolix), Jordan Hubbard of Walnut Creek CDROM Inc.; Bell Labs, Berkeley Software Distribution (BSD), FreeBSD Distros (GhostBSD, NetBSD), UNIX, Linux, FreeBSD Package Managers (FreeBSD Ports - FreeBSD Ports Collection), FreeBSD AI (FreeBSD MLOps-FreeBSD ML-FreeBSD DL), FreeBSD Compute (FreeBSD K8S-FreeBSD Containers-FreeBSD GitOps, FreeBSD IaaS-FreeBSD Linux-FreeBSD on Windows), FreeBSD Certification, FreeBSD Data Science (FreeBSD Databases-FreeBSD SQL-FreeBSD NoSQL-FreeBSD Analytics-FreeBSD DataOps), FreeBSD DevOps-FreeBSD SRE-FreeBSD Automation-FreeBSD Configuration-FreeBSD Configuration Management-FreeBSD Terraform-FreeBSD Ansible-FreeBSD Chef-FreeBSD Puppet-FreeBSD PowerShell)-FreeBSD CloudOps-FreeBSD Monitoring, FreeBSD Developer Tools (FreeBSD GitHub-FreeBSD CI/CD-FreeBSD VSCode-FreeBSD Serverless-FreeBSD Microservices-FreeBSD Service Mesh-FreeBSD Java-FreeBSD Spring-FreeBSD JavaScript-FreeBSD Python), FreeBSD Identity (FreeBSD IAM-FreeBSD MFA-FreeBSD Active Directory), FreeBSD Integration, FreeBSD IoT-FreeBSD Edge, FreeBSD Management-FreeBSD Admin-FreeBSD Shell-FreeBSD CLI-FreeBSD Ops, FreeBSD Governance, FreeBSD Media (FreeBSD Video), FreeBSD Migration, FreeBSD Mixed reality, FreeBSD Mobile, FreeBSD Networking (FreeBSD Load Balancing-FreeBSD DNS-FreeBSD NAT-FreeBSD VPC-FreeBSD VPN), FreeBSD Security (FreeBSD Vault-FreeBSD Secrets-HashiCorp Vault FreeBSD, FreeBSD Cryptography-FreeBSD PKI, FreeBSD Pentesting-FreeBSD DevSecOps), FreeBSD Storage-FreeBSD Filesystems (ZFS), FreeBSD Web-FreeBSD Node.js, FreeBSD Virtual Desktop, FreeBSD Product List. FreeBSD Awesome List, FreeBSD Docs, FreeBSD Glossary, FreeBSD Books, FreeBSD Courses, FreeBSD Topics. (navbar_freebsd and navbar_freebsd_detailed)
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