Collection of self-reproducing programs: each outputs a copy of its own source code; about 60 languages.

Updated monthly. Shows language popularity via world-wide availability of skilled engineers, courses, 3rd party vendors. Calculated from search engines Google, MSN, Yahoo.

Performance measurements and source code for ~25 benchmark programs in ~25 languages; with side-by-side comparisons for any 2 programming languages, and an interactive weighted ranking for all the languages.

Brief text on comparisons of C, C++, Java, Lisp, Ron Garret / Erann Gat study, with conforming example program Lisp source code; very useful links.

History of Programming Languages encyclopedia, over 8, 500 languages, full verified references, code samples, big bibliography, biographical-institutional material, 4, 000 language family tree.

Brian Kernighan's comparison of Pascal and C

Suite of common programming problems solved in Ada, C++, Erlang, Guile, Haskell, Java, Masd, merd, NASM, Objective Caml, Perl, Pliant, Python, Ruby, Tcl.

Many links to comparisons involving Python.

Compares canonical solutions to same problem as code samples in: C++, Dylan, E, Erlang, Haskell, JavaScript, Lisp (Arc, Common, Goo, Scheme), Lua, Maple, Mathematica, Oz-Mozart, NewtonScript, Perl, Python, REBOL, Ruby, Smalltalk, VBScript. [Paul Graham]

Shows source code implementation for the same simple program across over 250 different programming languages.