It depends on how you define "dead". ALGOL proper has been dead for many decades, but pretty much all mainstream general purpose PLs today are its direct descendants, and sometimes this ancestry is plain to see (e.g. every time you write "struct" or "void" in a C-like language, that's straight from ALGOL 68). I once wrote a comment on HN summarizing all the various bits and pieces I know of that are still around: https://news.ycombinator.com/item?id=18691821