My Befunged Signature 

One of my email signatures looks like this:

=----------------------------------------------= 64*>:00p258**44$$^>4$,1-:#v_v
| Alexios Chouchoulas, the Unpronounceable One | 4$#^; BEFUNGE97 ;^#_@#:-1$>#<
|        http://www.vennea.demon.co.uk/        | 4*2-*26g00*:-*58:<vg3/*48+*:$
=-----=[   ‘Eimai mia micri soupiera’   ]=-----= #@@@ooo:::...  .    .     .

The block of characters to the right is a Befunge 97 programme (it even has a comment in it saying so). It's been slightly compacted and made just a bit more obfuscated than it had to, but I like it. Executed, it prints this:

             .      ..               ..      .                       
          .     .       ...........       .     .                    
        .    .     ..     .......     ..     .    .                  
      .    .    .   ...................   .    .    .                
     .   .    .  .....:::::::::::::::.....  .    .   .               
            .  ...::::::ooooooooooo::::::...  .                      
          .  ...:::::ooooooooooooooooo:::::...  .                    
         .  ...:::oooooo@@@@@@@@@@@oooooo:::...  .                   
 .   .  .  ...:::ooooo@@@@@@@@@@@@@@@ooooo:::...  .  .   .           
    .     ...:::oooo@@@@@@@@@@@@@@@@@@@oooo:::...     .              
.   .  .  ..:::oooo@@@@@@@#######@@@@@@@oooo:::..  .  .   .          
.      . ...:::ooo@@@@@@###########@@@@@@ooo:::... .      .          
.      . ...:::ooo@@@@@@###########@@@@@@ooo:::... .      .          
.      . ...:::ooo@@@@@@###########@@@@@@ooo:::... .      .          
.   .  .  ..:::oooo@@@@@@@#######@@@@@@@oooo:::..  .  .   .          
    .     ...:::oooo@@@@@@@@@@@@@@@@@@@oooo:::...     .              
 .   .  .  ...:::ooooo@@@@@@@@@@@@@@@ooooo:::...  .  .   .           
         .  ...:::oooooo@@@@@@@@@@@oooooo:::...  .                   
          .  ...:::::ooooooooooooooooo:::::...  .                    
            .  ...::::::ooooooooooo::::::...  .                      
     .   .    .  .....:::::::::::::::.....  .    .   .               
      .    .    .   ...................   .    .    .                
        .    .     ..     .......     ..     .    .                  
          .     .       ...........       .     .                    

The thing calculates the distance of each character from the centre of the screen using the Pythagorean theorem (sans square root), then picks a character to draw. The characters are on the bottom row of the programme. They can all be redefined. Well, all but the one below the < sign on line 3 which must always be a space.

It's 29x4 bytes including data, with space to spare, but it only works on 80-column displays. You can easily adjust it. Actually finding the constants is left as an exercise for the advanced reader.

This program is provided here under the terms of the GNU General Public License, version 2.