A Victory at Sea variant by David Manley for the ACW, ironclad and wooden boat action between 1850-70's. 
Link 
 
 
These rules were handed out to all participants in a series of game at the Origins 1985 gaming convention in Baltimore MD.
Link 
 
 
Command Combat system. Play the north or south map, or combine them together.This scenario was made especially for those looking for a game at Historicon this year, which will be held in the town of Fredericksburg where the actual battle happened.
Link
 

Action Front

11/04/2012

 
A version of Warhammer for ACW period. Join the Yahoo group.
Link
 

State of War

21/03/2012

 
These rules are designed to allow small skirmishes using 28mm figures to recreate anything up to company sized action in the mid nineteenth century.
Link
 
 
Scaled battles for the American Civil War.
Link
 

Iron & Steam

10/02/2012

 
Naval miniature rules based on a set of Victorian pre-dreadnought rules.
Link
 

Severed Union

02/01/2012

 
_A set of ACW rules ideal for the beginner designed for 10mm.
Link
 
 
_These convention rules contemplate ship-to-ship combat of perhaps a dozen 15mm vessels per side, Union Logs and Confederate logs.
Link
 

ACW Rules SIP

03/11/2011

 
Neil Thomas Simplicity in Practice Rules.
Link