Unified Theory Games have released the Zombie Apocalypse supplement for their Vortex sci-fi rules.
From their announcement:
Unified Theory Games has released a new free Vortex Bonus Supplement: Zombie Apocalypse. Just in time for Halloween, Zombie Apocalypse includes a new Combatant, a ravenous zombie, and a new challenging Scenario that pits the last vestiges of civilization against a relentless reanimated horde. This Bonus Material is for use with the free Vortex: Basic Battlefield Rules.
Zombie Apocalypse and the Vortex: Basic Battlefield Rules are available for free from www.UnifiedTheoryGames.com. Look for tips in dealing with the undead menace on UTG’s Facebook page.
The Vortex Core Rulebook, scheduled for print in late 2010, is a fully customizable miniature skirmish game for use with any miniature in any setting.