Source code (Brainfuck):
Input box: ( use this input box instead of prompt)

Examples

Load and press run

sources from wikipedia

Hello world! Addition Multiplication Division Uppercase a string

Try debugging some program

Breakpoint sample

some brainfuck fluff by daniel b cristofani

Brainfuck to C translator Brainfuck interpreter Factorial Number graphic display Square numbers from 1 to 10000

text to brainfuck code by marco bacer

convert text to brainfuck 
[Translates brainfuck to C. Assumes no-change-on-EOF or EOF->0.
Generated C does no-change-on-EOF, and uses unistd.h read and write calls.
Daniel B Cristofani (cristofdathevanetdotcom)
http://www.hevanet.com/cristofd/brainfuck/]

[input a brainfuck program and its input, separated by an exclamation point.
Daniel B Cristofani (cristofdathevanetdotcom)
http://www.hevanet.com/cristofd/brainfuck/]

This program doesn't terminate; you will have to kill it.
Daniel B Cristofani (cristofdathevanetdotcom)
http://www.hevanet.com/cristofd/brainfuck/

[Enter a number using ()-./0123456789abcdef and space, and hit return.
Daniel B Cristofani (cristofdathevanetdotcom)
http://www.hevanet.com/cristofd/brainfuck/]

[Outputs square numbers from 0 to 10000.
Daniel B Cristofani (cristofdathevanetdotcom)
http://www.hevanet.com/cristofd/brainfuck/]