Ruby 2.1.1 is released and Ruby turns 21
I was a bit surprised about the age, and wondering where it fits into the timeline, so I put together the following list (years corresponding to the "appeared" indication taken from Wikipedia). (There will likely be nicer lists elsewhere..)  1957 (57) Fortran
  1958 (56) Lisp
  1958 (56) ALGOL
  1959 (55) COBOL
  1964 (50) APL
  1970 (44) Pascal
  1970s     Forth
  1972 (42) C
  1972 (42) Prolog
  1972 (42) Smalltalk
  1973 (41) ML
  1975 (39) Scheme
  1978 (36) TeX
  1982 (32) PostScript
  1983 (31) C++
  1983 (31) Objective-C
  1984 (30) Common Lisp
  1986 (28) Erlang
  1987 (27) Perl
  1990 (24) Haskell
  1991 (23) Python
  1993 (21) Ruby (according to article)
  1994 (20) ANSI Common Lisp
  Mid 1990s Dylan
  1995 (19) Java
  1995 (19) Ruby (according to Wikipedia)
  1995 (19) JavaScript
  1996 (18) Ocaml
  2000 (14) C#
  2003 (11) Scala
  2003 (11) Factor
  2005  (9) F#
  2007  (7) Clojure
  2008  (6) Nimrod (according to speedydeletion.wikia.com)
  2009  (5) CoffeeScript
  2009  (5) Go
  2012  (2) Rust
  2012  (2) Julia

(edit: added Clojure, of course)
(edit 2: added ObjC, Dylan, Nimrod, Go, Rust, Julia)