John Gilmore was the fifth employee of Sun Microsystems and later became one of the most prominent figures at the intersection of free software and civil liberties. His connections to stallman and the gnu-project run across multiple institutions.
As a programmer, Gilmore contributed to GNU tools including GNU tar and work on debugger infrastructure. More consequentially, he co-founded Cygnus Solutions in 1989 with Michael Tiemann and David Henkel-Wallace — the first company built around the business model of selling support for free software, a practical demonstration that the free-software-definition was compatible with commercial viability.
In 1990, Gilmore co-founded the electronic-frontier-foundation with Mitch Kapor and himself in response to a series of government raids on hackers. The EFF became the primary civil liberties organization defending digital rights in the courts and legislatures, operating in an adjacent space to the free-software-foundation's software-focused mission. The two organizations have frequently aligned on issues of encryption, surveillance, and the right-to-read type of threats that stallman analyzed.
Gilmore has served on the FSF board, including in 2024, representing continuity of the original hacker-culture cohort that surrounded stallman in the mit-ai-lab-hacker-culture-1971-1984 era and its aftermath. He was present at the netscape-mozilla-open-source-1998 strategy session where christine-peterson coined "open source," though Gilmore's own commitments remained closer to Stallman's freedom-centered framing.
His broader activism — including litigation over the right to travel without ID and work on cryptographic freedom — reflects the same instinct that produced the four-freedoms: that individuals' control over their tools and communications is a matter of fundamental liberty, not mere convenience.