Here’s a 11th Order quine (11 languages) by Yusuke Endoh

# ruby
l=92.chr;eval s="s=s.dump[r=1..-2].gsub(/("+l*4+"){4,}(?!¥")/){|t|'¥"+l*%d+¥"'%(t
.size/2)};5.times{s=s.dump[r]};puts¥"# python¥¥nprint(¥¥¥"# perl¥¥¥¥nprint(¥¥¥¥¥¥
¥"# lua"+l*4+"nprint("+l*7+"¥"(* ocaml *)"+l*8+"nprint_endline"+l*15+"¥"-- haskel
l"+l*16+"nimport Data.List;import Data.Bits;import Data.Char;main=putStrLn("+l*31
+"¥"/* C */"+l*32+"n#include"+l*32+"nint main(void){char*s[501]={"+l*31+
"¥"++intercalate"+l*31+"¥","+l*31+"¥"(c(tail(init(show("+l*31+"¥"/* Java */"+l*32
+"npublic class QuineRelay{public static void main(String[]a){String[]s={"+l*31+"
¥"++intercalate"+l*31+"¥","+l*31+"¥"(c("+l*31+"¥"brainfuck"+l*64+"n++++++++[>++++
<-]+++++++++>>++++++++++"+l*31+"¥"++(concat(snd(mapAccumL h 2("+l*31+"¥"110"+l*31
+"¥"++g(length s)++"+l*31+"¥"22111211100111112021111102011112120012"+l*31+"¥"++co
ncatMap("+l*32+"c->let d=ord c in if d<11then"+l*31+"¥"21002"+l*31+"¥"else"+l*31+
"¥"111"+l*31+"¥"++g d++"+l*31+"¥"22102"+l*31+"¥")s++"+l*31+"¥"2100211101012021122
2211211101000120211021120221102111000110120211202"+l*31+"¥"))))))++"+l*31+"¥","+l
*63+"¥""+l*64+"n"+l*63+"¥"};int i=0;for(;i<94;i++)System.out.print(s[i]);}}"+l*31
+"¥")))))++"+l*31+"¥",0};int i=0;for(;s[i];i++)printf("+l*63+"¥"%s"+l*63+"¥",s[i]
);puts("+l*63+"¥""+l*63+"¥");return 0;}"+l*31+"¥");c s=map("+l*32+"s->"+l*31+"¥""
+l*63+"¥""+l*31+"¥"++s++"+l*31+"¥""+l*63+"¥""+l*31+"¥")(unfoldr t s);t[]=Nothing;
t s=Just(splitAt(if length s>w&&s!!w=='"+l*31+"¥"'then 501else w)s);w=500;f 0=Not
hing;f x=Just((if x`mod`2>0then '0'else '1'),x`div`2);g x= reverse (unfoldr f x);
h p c=let d=ord c-48in(d,replicate(abs(p-d))(if d

<'else '>')++"+l*31+"¥"
."+l*31+"¥");s="+l*31+"¥"# ruby"+l*32+"n"+l*31+"¥"++"+l*31+"¥"l=92.chr;eval s=¥"+
(z=l*31)+¥"¥¥¥"¥"+s+z+¥"¥¥¥""+l*31+"¥"++"+l*31+"¥""+l*32+"n"+l*31+"¥""+l*15+"¥""+
l*7+"¥")"+l*4+"n¥¥¥¥¥¥¥")¥¥¥")¥"########### (c) Yusuke Endoh, 2009 ###########¥n"

The Ruby code above generates Python code, which generates Perl code, which generates Lua code, which generates OCamlcode, which generates Haskell code, which generates C code, which generates Java code, which generates Brainfuck code, which generates Whitespace code, which generates Unlambda code, which generates the original Ruby code again.
more such crazy stuff at International Obfuscated C Code Contest (IOCCC)
Conway’s Game of Life in one line of APL

To properly try this, you’ll require the following versions of each compiler:

* ruby 1.8.7-p72
* Python 2.5.2
* perl v5.10.0
* Lua 5.0.3
* OCaml 3.10.2
* ghc-6.8.2
* gcc 4.3.2
* java "1.5.0_17"
* beef 0.0.6-2
* whitespace 0.3-2
* unlambda 2.0.0-5

Credit goes to Yusuke Endoh for this masterpiece of programming art.