Brainfuck
For the sake of readability and simplicity
I know that this bf program is far from beeing optimized using 4 bytes of data memory yet it is quite stable on my setup. I think that we should settle up on a cli version creating gui as a frontend. A separate library with bindings for different languages would be even better thing. This way one could easily implement a nicely scalable solution for whole hosts farms using client—server paradigm. With code below I wanted to create only a rapid prototype (hence the language choice) but IMO more universal facility with various backends would be a definite go.
++>++++++>+++++<+[>[->+<]<->++++++++++<]>>.<[-]>[-<++>]<----------------. ---------------.+++++.<+++[-<++++++++++>]<.>>+.++++++++++.<<.>>+.------------.---.<<.>>---.+++.++++++++++++++.+.<<+.[-]++++++++++.
~ TheBodziO, 2008-05-14 14:12:44