The Directory of Open Access Journals (DOAJ) covers 164 Law journals in a variety of languages published in various countries.  Tschüß, Lyo:

http://doaj.org/doaj?func=subject&cpId=46&uiLanguage=en

A resource to add to the free and low-cost sources of law journal articles FAQ thread…J:

http://listserver.ciesin.columbia.edu/cgi-bin/wa?A2=ind1302d&L=INT-LAW&D=0&P=88

The DOAJ covers other topics too:

http://doaj.org/doaj?func=subject&uiLanguage=en

Milestones: Directory of Open Access Journals Reaches 1 Million Searchable Articles (Gary Price, InfoDocket, Library Journal March 14, 2013)

http://www.infodocket.com/2013/03/14/milestones-directory-of-open-access-journals-reaches-1-million-searchable-articles/