'Akila
Carthaginian Law

Committee for the Promotion of Virtue and the Prevention of Vice

Comparing Islamic law on commercial transactions with American law

Difference between Amish and Mennonite

Different Schools of Islamic Law
Schools of law from before the current four

Different sects in Islam and impact on Saudi Society
Dinka

Family life in Islam and Judaism

Hindu legal system

Inheritance in Islamic Law

Islamic Economic legal system

Islamic legal system in Arabia? Alsulami, Bakr

Relation between Jewish and Muslim law
Marriage in Islam

Nuer

Outlaw Motorcycle Gangs
pre-Islamic law

Sikhism legal system

War law in Islam

Ideas for possible papers
(I do not know for which of these information can be found)
(Strikeouts are legal systems someone currently plans to do)

African Customary Law (part of the current South African system)

Anglo-Saxon Law
Any of the early Germanic systems other than the Visigoths, who I have a paper on already. [Carolingian, Merovingian, Ostrogothic, …]

Berber law

Breton Law

Ethiopian law
Jesuit Law–the rules of the Society of Jesus (which runs this university)

Non-fiqh Islamic courts and their law: Shurta, Mazalim, muhtasib ...
Ottoman Law, especially Kanun

Tallensi (M. Fortes, The Dynamics of Clanship among the Tallensi)
The legal systems of monastic orders

Welsh Law

There is a long list of countries with links to material on their law in the Wikipedia article on

Legal Systems in Asia. 

Some African systems might be found in E.E. Evans-Pritchard (ed.) African Political Systems