DFB may refer to:
The DFB Futsal Cup is the top futsal championship in Germany. It was founded in 2006. The championship which is played under UEFA rules, currently consists of 8 teams.
DragonFly BSD is a free and open source Unix-like operating system created as a fork of FreeBSD 4.8. Matthew Dillon, an Amiga developer in the late 1980s and early 1990s and a FreeBSD developer between 1994 and 2003, began work on DragonFly BSD in June 2003 and announced it on the FreeBSD mailing lists on 16 July 2003.