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Axiom (computer algebra system)

Bc (programming language)

Berkeley DB

Binary File Descriptor library

Bhyve

BIRT Project

Bochs

Boo (programming language)

Botan (programming library)

Brotli

BSD libc

Budgie (desktop environment)

C-Store

Caddy (web server)

CakePHP

Calibre (software)

Capistrano (software)

Cdb (software)

CERN httpd

Cervisia

Cgroups