Letter: B
- BasiliskII - 68k Macintosh emulator
- blcr - Berkeley Lab Checkpoint/Restart for Linux
- blcr-kmod - Kernel module (kmod) for Berkeley Lab Checkpoint/Restart for Linux
- bubbros - Bub and Brothers game inspired by the classic Bubble and Bobble
- buildsys-build-rpmfusion - Tools and files used by the rpmfusion buildsys