Fate Core

The Fate system, circa 2013

a preview of the rules can be obtained through gaming with someone involved in the Kickstarter here

FATE Core Game Spinoffs

Achtung! Cthulhu - Chris Birch
Apotheosis Drive X - David Hill
Arthur Lives! - Jason Tondro
Atomic Robo - Evil Hat [which presumably will get a company page here sometime]
The Demolished Ones - Brian Engard
Ehridgor - Allen Turner
Mindjammer 2nd Edition - Sarah Newton
Nova Praxis - Mike McConnell
Tianxia - Vigilance Press
Time Heroes - Andrew Goenner

A Guide to Blocking

Community Fate Core Extensions

Fate Core Extras