STL of C++
Alexander Stepanov came up the idea of STL back to the days of USSR...
Arnold Robbins has been the primary hacker of GNU AWK since 1994.
The Success and Failure of Ninja http://neugierig.org/software/blog/2020/05/ninja.html
Ninja is designed to be the assembly of build systems. It is widely used by CMake, Meson and Chrome.
The History of Standard ML by David MacQueen, Robert Harper, John Reppy https://smlfamily.github.io/history/SML-history.pdf
Robert Harper http://www.cs.cmu.edu/~rwh/ is the original author of Standard ML.
Evolution of Emacs Lisp by Stefan Monnier http://www.iro.umontreal.ca/~monnier/hopl-4-emacs-lisp.pdf
Stefan Monnier https://www.iro.umontreal.ca/~monnier/ is one of the core members of emacs-devel.