Jamie Zawinski. Jeff Dean and a lot of the other early Google employees, many of whom aren't well known outside the company. Dave Cutler, Steve Wozniak, Doug Cutting, John Carmack.
"As a UC Berkeley graduate student, Joy worked for Fabry's Computer Systems Research Group CSRG in managing the BSD support and rollout where many claim he was largely responsible for managing the authorship of BSD UNIX, from which sprang many modern forms of UNIX, including FreeBSD, NetBSD, and OpenBSD. Apple Inc. has based much of the Mac OS X kernel and OS Services on the BSD technology.
Some of his most notable contributions were the vi editor, NFS, and csh. Joy's prowess as a computer programmer is legendary, with an oft-told anecdote that he wrote the vi editor in a weekend. Joy denies this assertion.[2]"
