ASCII Art Code Generator
Perl &rarr; Befunge, 868 bytes

OK, I'll get the ball rolling. This could be golfed down a bit more, but my head is starting to hurt...

$_=" f,j f,jjj f,lgdlH,b &gt;llb ,l,b lb ,lb , f,j f j f &gt;&gt;l&gt;,lb ,9vb &gt;lb,Hlb,H&gt;vb &gt;999*+,
mg8Hg8Ha8c8g8Hgb8Hab8,8k/ 8Ha8Hi /H8HgH8g8k &gt;H9ghgH9b 'bhbhgH9ghg9+gH9ga//
ma8Hg8Ha8c8ahgbhabhh /bhah VdhibHH9ghb &gt;H9ghgH9abhbhgH*g9+g ii /b&gt;l,^b // 
&gt;H^&gt;&gt;Hned*angne ned* eneknabnn&lt;b nangn idH*gned*gneb*&gt;&gt;,b *kngH5g*6 Adb&gt;&lt;aha//b
H*g2HgH3a4Hg5Ha6c7gHHgb1Hab2+3H ib4Ha5Hg6kiHH7g8c, id1H iabHk3k4+g &gt;+ ,^&gt;^dd 7/ ib *k //b 
+1g+HgH+g+Hg+Ha+c+g,Hgb+kk &gt;^+ki +Ha+Hg+HgH+g+cki'+ki ,gk+k&gt;^gbHc^H 9*gb8+b//a
^&lt;b ^&gt;^ebe^'&gt;^e &gt;^e&gt;&gt;^a &gt;^&gt;&gt; &gt;^gd&gt;^ke&gt; &gt;^b '&gt;^e&gt;&gt;^g&gt;^g e^ &gt;^a &gt;^~'i&gt;^b i &gt;2+^b &gt;^b e&gt;gHaV V &gt;^gb&gt;^bHHHHHH";
s/n/*H/g;s/m/H8g8HgH8/g;s/l/v&gt;/g;s/k/Hb/g;s/j/f&gt;,/g;s/i/\\/g;s/h/9H/g;s/g/bd/g;s/f/ve/g;s/e/&gt;&gt;&gt;/g;s/d/ H/g;s/c/HaH/g;s/b/  /g;s/a/    /g;@f=split$/;
@s=split('',$ARGV[0]);foreach$r(0..6){for($i=0;$i&lt;@s;$i++){print substr($f[$r],(ord($s[$i])-65)*6,6).$"}print$r?'':' @',$/}


Examples:

The shorter examples can be copy-pasted into online interpreters like this one, but UNCOPYRIGHTABLE appears to result in a program that is too long for all the online interpreters to handle.

$ perl bf.pl ABCDEFGHI
 v&gt;&gt;&gt;, v&gt;&gt;&gt;&gt;,  v&gt;&gt;&gt;, v&gt;&gt;&gt;&gt;, v&gt;&gt;&gt;&gt;, v&gt;&gt;&gt;&gt;,  v&gt;&gt;&gt;, v&gt;   H  Hv&gt;H,  @
H8   H 8H   H H8   H 8H   H 8H     8H     H8   H 8H   H   8H   
H8   H 8H   H H8     8H   H 8H     8H     H8     9H   H   9H   
&gt;H^&gt;&gt;H *H&gt;&gt;&gt;  H*     *H   H *H&gt;&gt;&gt;  *H&gt;&gt;&gt;  H* &gt;&gt;&gt; *H&gt;&gt;&gt;H   *H   
H*   H 2H   H H3     4H   H 5H     6H     H7   H HH   H   1H   
+1   H +H   H H+   H +H   H +H     +H     H+   H ,H   H   +H   
^&lt;   ^ &gt;^&gt;&gt;&gt;   &gt;&gt;&gt;^' &gt;^&gt;&gt;&gt;  &gt;^&gt;&gt;&gt;&gt; &gt;^      &gt;^&gt;&gt;  &gt;^   H  H&gt;^H  


$ perl bf.pl JKLMNOPQR
   &gt;v&gt; v&gt;   , v&gt;,    v&gt;   , v&gt;   ,  v&gt;&gt;&gt;, v&gt;&gt;&gt;&gt;,  v&gt;&gt;&gt;  v&gt;&gt;&gt;&gt;,  @
    8, 8H  /  8H     8H\ /H 8H   H H8   H 8H   &gt; H9   H 9H   H 
    9H 9H /   9H     9H V H 9H\  H H9   H 9H   &gt; H9   H 9H   H 
    *H *H&lt;    *H     *H   H *H \ H H*   H *H&gt;&gt;&gt;  H*   H *H&gt;&gt;&gt;  
    2+ 3H \   4H     5H   H 6H  \H H7   H 8H     H, \ H 1H \   
H   &gt;^ +H  \  +H     +H   H +H   H H+   H +H     HH  \' +H  \  
 &gt;&gt;&gt;&gt;  &gt;^   ' &gt;^&gt;&gt;&gt;&gt; &gt;^   H &gt;^   H  &gt;&gt;&gt;^  &gt;^      &gt;^~'\ &gt;^   \ 


$ perl bf.pl STUVWXYZ
 v&gt;&gt;&gt;  &gt;&gt;v&gt;&gt;, v&gt;   , 9v   &gt; v&gt;  ,H v&gt;  ,H &gt;v   &gt; 999*+,  @
H9   '   9H   9H   H H9   H 9H   H 9+   H H9   H     // 
H9       9H   9H   H H*   H 9+   H  \\ /   &gt;v&gt;,^    //  
 *&gt;&gt;,    *H   *H   H H5   H *6 A H   &gt;&lt;     9H     //   
    HH   3H   4+   H  &gt;+ ,^ &gt;^ H H  7/ \    *H    //    
,   HH   +H   &gt;^   H   HH     H^H  9*   H   8+   //     
 &gt;2+^    &gt;^    &gt;&gt;&gt;&gt;    HH     V V  &gt;^   H   &gt;^   HHHHHH 


$ perl bf.pl UNCOPYRIGHTABLE
v&gt;   , v&gt;   ,  v&gt;&gt;&gt;,  v&gt;&gt;&gt;, v&gt;&gt;&gt;&gt;, &gt;v   &gt; v&gt;&gt;&gt;&gt;,  Hv&gt;H,  v&gt;&gt;&gt;, v&gt;   H &gt;&gt;v&gt;&gt;,  v&gt;&gt;&gt;, v&gt;&gt;&gt;&gt;, v&gt;,    v&gt;&gt;&gt;&gt;,  @
9H   H 8H   H H8   H H8   H 8H   &gt; H9   H 9H   H   8H   H8   H 8H   H   9H   H8   H 8H   H 8H     8H     
9H   H 9H\  H H8     H9   H 9H   &gt;  &gt;v&gt;,^ 9H   H   9H   H8     9H   H   9H   H8   H 8H   H 9H     8H     
*H   H *H \ H H*     H*   H *H&gt;&gt;&gt;    9H   *H&gt;&gt;&gt;    *H   H* &gt;&gt;&gt; *H&gt;&gt;&gt;H   *H   &gt;H^&gt;&gt;H *H&gt;&gt;&gt;  *H     *H&gt;&gt;&gt;  
4+   H 6H  \H H3     H7   H 8H       *H   1H \     1H   H7   H HH   H   3H   H*   H 2H   H 4H     5H     
&gt;^   H +H   H H+   H H+   H +H       8+   +H  \    +H   H+   H ,H   H   +H   +1   H +H   H +H     +H     
 &gt;&gt;&gt;&gt;  &gt;^   H  &gt;&gt;&gt;^'  &gt;&gt;&gt;^  &gt;^       &gt;^   &gt;^   \  H&gt;^H   &gt;^&gt;&gt;  &gt;^   H   &gt;^   ^&lt;   ^ &gt;^&gt;&gt;&gt;  &gt;^&gt;&gt;&gt;&gt; &gt;^&gt;&gt;&gt;&gt; 




Note:

The @ character at the end of the first line of output tells Befunge to stop running. Without it, the program would keep repeating the same word forever.