American common law
The United States and most Commonwealth countries are heirs to the common law legal tradition of English law.[15] Certain practices traditionally allowed under English common law were expressly outlawed by the Constitution, such as bills of attainder[16] and general search warrants.[17]
As common law courts, U.S. courts have inherited the principle of stare decisis.[18] American judges, like common law judges elsewhere, not only apply the law, they also make the law, to the extent that their decisions in the cases before them become precedent for decisions in future cases.[19]
http://en.wikipedia.org/wiki/Law_of_the_United_States#American_common_law
Common law is currently in practice in Ireland, most of the United Kingdom (England and Wales and Northern Ireland), Australia, New Zealand, India (excluding Goa), Pakistan, South Africa, Canada (excluding Quebec), Hong Kong, the United States (excluding Louisiana) and many other places.
en.wikipedia.org/wiki/List_of_countryhttp://en.wikipedia.org/wiki/Law_of_the_United_States#American_common_law_legal_systems
A reception statute is a statutory law adopted as a former British colony becomes independent, by which the new nation adopts (i.e. receives) pre-independence English law, to the extent not explicitly rejected by the legislative body or constitution of the new nation. Reception statutes generally consider the English common law dating prior to independence, and the precedents originating from it, as the default law, because of the importance of using an extensive and predictable body of law to govern the conduct of citizens and businesses in a new state. All U.S. states, except Louisiana, have either implemented reception statutes or adopted the common law by judicial opinion.[1]
http://en.wikipedia.org/wiki/Reception_statutes
Examples of “reception statutes”
Virginia, Va. Code §§ 1-200, 1-201, www.state.va.us/cmsportal3/government_4096/codes_and_laws.html
§ 1-200. The common law.
The common law of England, insofar as it is not repugnant to the principles of the Bill of Rights and Constitution of this Commonwealth, shall continue in full force within the same, and be the rule of decision, except as altered by the General Assembly.
(Code 1919, § 2, § 1-10; 2005, c. 839.)
§ 1-201. Acts of Parliament.
The right and benefit of all writs, remedial and judicial, given by any statute or act of Parliament, made in aid of the common law prior to the fourth year of the reign of James the First, of a general nature, not local to England, shall still be saved, insofar as the same are consistent with the Bill of Rights and Constitution of this Commonwealth and the Acts of Assembly.
(Code 1919, § 3, § 1-11; 2005, c. 839.)
Virginia’s 1776 statute stated: [The] common law of England, [and] all statutes or acts of Parliament made in aid of the common law prior to the fourth year of the reign of King James the first . . . shall be considered as in full force, until the same shall be altered by the legislative power of this colony.
North Carolina, N.C. Gen. Stat. § 4-1 (1999), www.ncga.state.nc.us/gascripts/statutes/Statutes.asp
§ 4 1. Common law declared to be in force.
All such parts of the common law as were heretofore in force and use within this State, or so much of the common law as is not destructive of, or repugnant to, or inconsistent with, the freedom and independence of this State and the form of government therein established, and which has not been otherwise provided for in whole or in part, not abrogated, repealed, or become obsolete, are hereby declared to be in full force within this State. (1715, c. 5, ss. 2, 3, P.R.; 1778, c. 133, P.R.; R.C., c. 22; Code, s. 641; Rev., s. 932; C.S., s. 970.)
Alabama, Ala. Code § 1-3-1 (1975), www.alabama.gov/portal/index.jsp
Common law of England adopted.
The common law of England, so far as it is not inconsistent with the Constitution, laws and institutions of this state, shall, together with such institutions and laws, be the rule of decisions, and shall continue in force, except as from time to time it may be altered or repealed by the Legislature.
(Code 1907, §12; Code 1923, §14; Code 1940, T. 1, §3.)
http://faculty.samford.edu/~medebow/ReceptionStatutes.html