This is a list of the top languages on Github, sorted by popularity. It was made by a small script here. I think it’s strange that editor languages rank so high (Emacs Lisp and VimL). It would be very easy to manipulate the ranks, though, because the method only considers total bytes pushed. Nevertheless it’s an interesting comparison.
This list was generated on April 21, 2010, so it’s likely changed since then :)
1. Ruby
2. JavaScript
3. Perl
4. Python
5. Shell
6. PHP
7. C
8. Java
9. C++
10. Objective-C
11. Emacs Lisp
12. C Sharp
13. VimL
14. Haskell
15. ActionScript
16. Lua
17. Erlang
18. Clojure
19. Common Lisp
20. Scala
21. Scheme
22. Groovy
23. Visual Basic
24. ASP
25. D
26. OCaml
27. Tcl
28. R
29. ColdFusion
30. Go
31. Smalltalk
32. FORTRAN
33. SuperCollider
34. Objective-J
35. Pure Data
36. Verilog
37. CoffeeScript
38. Io
39. VHDL
40. ooc
41. Eiffel
42. HaXe
43. Nu
44. Arc
45. Boo
46. Self
48. sclang