Similar to FLTK

Berry Linux

Binary File Descriptor library

Bhyve

BIRT Project

Boo (programming language)

BootX (Apple)

Brackets (text editor)

Brotli

BSD libc

Budgie (desktop environment)

C-Store

Cacti (software)

Caddy (web server)

CakePHP

Calibre (software)

Capistrano (software)

Ccache

Cdb (software)

Cdparanoia

Cdrkit

CERN httpd