Befunge CPAN Module - Official Perl extension for interpreting Befunge.
Befunge "Hello, World" Program - Three-line chunk of source code written by Tim Gilbert.
Ben Olmstead's MTFI/MCBC Distribution Page - Features two different Befunge implementations: MTFI is a interpreter capable of running three different Befunge dialects, MCBC is an MS-DOS only Befunge-93 compiler.
Dictionary of Programming Languages Befunge Page - Brief language fact sheet, complete with links to conceptually related languages.
Cat's Eye Technologies' Befunge - The "official" web site for the Befunge programming language; maintained by Chris Pressey, the creator of Befunge.
Dufflebunk's Home Page - Funge-98 implementation in JavaScript.
Esoteric Languages Database: Befunge - Annotated link list on Befunge and a couple of other esoteric languages closely related to Befunge.
Esoteric Languages Database: The Befunge Programming Language - Synopsis, related Languages, resources.
Funge-98 Final Specification - Page mirroring the 1998 revision's official specification.
Ninety-Nine Bottles of Beer - Befunge version of the infamous beer song program.
RC/Funge-98 - Funge-93/Funge-98 implementation complete with integrated debugger and optional support for extensions like Unefunge, Trefunge and Minifunge.
Visual Befunge-93 for Windows - Absolutely non-portable, Windows-only, 'Visual Studio'-style IDE for Befunge.
VSync's Funge Stuff - Features a portable Befunge-93 pseudocompiler and several other compilers and interpreters. Demonstrates how to use Befunge as a CGI scripting language.
Wierd - Absolutely sick Befunge-descendant language.
ZBefunge - A Befunge-93 interpreter written in Inform, and runnable on just about anything.