Robert Sanford Havoc Pennington (born c. 1976) is an American computer engineer and entrepreneur.
He is known in the free software movement due to his work on HAL, GNOME, Metacity, GConf, and D-Bus.
After graduation, he worked at Red Hat as a Desktop manager/engineer for nine years, ending in 2008.
From 2008 until June 2011, he worked on a consumer product for the startup company Litl (hardware, and proprietary software and services).
[1] In 2017 he cofounded Tidelift, which seeks to improve the ecosystem around open source software by providing support for professional teams using open source and helping maintainers build sustainable businesses around their projects.