Similar to GNAT

Beamer (LaTeX)

Berkeley DB

Berry Linux

Bhyve

BIRT Project

Blackbox

Blink (browser engine)

BlueGriffon

Bochs

Boo (programming language)

Botan (programming library)

Brackets (text editor)

Brasero (software)

Comparison of BSD operating systems

Budgie (desktop environment)

Bullet (software)

Byobu (software)

C-Store

Cacti (software)

Caddy (web server)

Cairo (graphics)

CakePHP

Calibre (software)

Cdb (software)