4mhz.de
   Provides Brainfuck Developer, an Integrated Development Environment for the language running on Microsoft Windows.
   http://4mhz.de/bfdev.html

BF Debugger Project
   An integrated GUI debugger for the development of software using the Brainfuck programming language.
   http://bfdebug.sourceforge.net/

BFBASIC compiler
   A Basic to Brainfuck compiler written on Java that runs on Windows and Linux.
   http://kidsquid.com/old/compilers/bfbasic/index.html

BrainFuck
   A theoretical elaboration including an interpreter/debug-applet.
   http://homepages.uni-paderborn.de/skoehler/html/

BrainFuck Tools, Utilities and Games
   Provides tools, utilities, games for and written in BF. There are also some articles on creating CGI Scripts in Brainfuck or making a Brainfuck program executable (on Linux).
   http://jonripley.com/brainfuck/

BrainScript
   ActiveScript Brainfuck implementation. It allows you to write web page scripts on Brainfuck.
   http://brainscript.sourceforge.net/

Brainf***
   Introduction to programming in Brianfuck; interpreters written in Brainfuck, C, JavaScript and many links.
   http://www.iwriteiam.nl/Ha_BF.html

Brainf*ck .Net Compiler
   Brainfuck compiler that outputs .NET IL code. Includes source of sample programs.
   http://bluesorcerer.net/esoteric/bf.html

Brainfuck Archive
   Programs, compilers, interpreters, utilities, in source and compiled versions.
   http://esoteric.sange.fi/brainfuck/

Brainfuck Interpreter in PHP
   Provides a Brainfuck Interpreter written in PHP and some samples to get started.
   http://daniel.lorch.cc/projects/brainfuck/

Brainfuck Machine
   A Brainfuck IDE with interpreter, debugger, compiler and tools (for example: converting BF to other programming languages, random BF code generation).
   http://www.kacper.kwapisz.eu/index.php?i=19

Branfuck.NET Compiler
   Brainfuck compiler for Microsoft .Net Framework. Compiles Brainfuck programs into Portable Executable files (exe)
   http://www.jabb-sch.narod.ru/bf/

Chaos Computer Club Cologne: Brainfuck
   Descriptions (language, theory), code samples, software (compilers, assembler, interpreter), mail list, links. English, Deutsch.
   http://koeln.ccc.de/prozesse/zombies/brainfuck/index.en.xml

Clifford's Homepage - The Brainf*ck Compiler
   A C-like language that compiles to brainfuck.
   http://www.clifford.at/bfcpu/bfcomp.html

Esolang Wiki: Brainfuck
   An overview of the language, history, and example code.
   http://esolangs.org/wiki/Brainfuck

Esoteric Non-existent Standards Institute
   Contains some efforts to provide formal language specifications for BF, and other resources.
   http://esoteric.sange.fi/ENSI/

FuckBrainfuck (FBF)
   A programming language that compiles to Brainfuck.
   http://inshame.blogspot.com/search/label/My%20Progs%3A%20FuckBrainfuck

GBrainfuck
   A GPL'ed Brainfuck language interpreter written in C and intended to run on *NIX machines.
   http://gbf.sourceforge.net/

Mr. Rock's Brainfuck Pages
   Language introduction, tutorial, resources, BF to Perl converter.
   http://cydathria.com/bf/

Online Brainfuck Interpreter
   Execute Brainfuck programs online with this JavaScript implementation.
   http://justice.loyola.edu/~mcoffey/pr/5k/i.html

PEBBLE
   A programming language that compiles to Brainfuck and C.
   http://pikhq.nonlogic.org/pebble.php

Taking Over The World
   A short text game completely written by hand in Brainfuck.
   http://www.49-6-dev.net/takingovertheworlden.htm

The Brainfuck CPU
   A processor that natively runs Brainfuck code.
   http://www.clifford.at/bfcpu/bfcpu.html

The Brainfuck Programming Language
   Brief overview, introduction to commands, informal standards for programmers and implementers, and related resources.
   http://www.muppetlabs.com/~breadbox/bf/

Tutorial in Brainfuck Programming
   Contains a comprehensive tutorial and the source code for a 171 bytes long Brainfuck compiler.
   http://neworder.box.sk/newsread.php?newsid=13065

VBBrainFNET
   A Brainfuck IDE (editor, interpreter, debugger and compiler) written in VB.NET (.NET 2.0)
   http://software.xfx.net/utilities/vbbfck/index.php

libbf
   A free portable library for Brainfuck fast interpretation, optimization, compilation and execution
   http://savannah.nongnu.org/projects/libbf

mod_bf
   Apache webserver Brainfuck module; several BF code handlers. Easily make dynamic webpages in BF. Simple example of uses of Apache API, simpler than standard Apache mod_example. Descriptions, downloads, links. [Open Source, GPL]
   http://modbf.sourceforge.net/

phpBrainfuckInterpreter
   A PHP based Brainfuck interpreter which gives verbose feedback as a program runs to aid in debugging.
   http://sviip.dk/phpi/brainfuck/interpreter.php