Surf is essentially a "window to the web" that eliminates all browser chrome to provide the most distraction-free browsing experience possible.
Uzbl was a pioneering, minimalist web browser designed around the Unix philosophy of "do one thing well" and "make programs work together
BOSS OS is either the Indian Linux distribution promoting digital independence, or a conceptual term for a core managing system, most famously realized in early web-based desktop environments
Shiira was a promising and elegant browser that ultimately couldn't keep pace with the rapid evolution of web technologies
TempleOS Entire OS is a single developer’s creation, including kernel, compiler, editor, and even the shell
Originally Acorn Computers, now maintained by RISC OS Open Ltd