Pillars of Islam

Almsgiving (Zakat)

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The Zakat of Property

http://www.orst.edu/groups/msa/books/zakat.html - English
A brief explanation of the calculation of zakat and when zakat is due
 

Zakat (the Alms Tax)

http://www.unn.ac.uk/societies/islamic/about/islam/charity.htm - English

 

Zakaat - Obligatory Charity

http://islaam.com/Section.aspx?id=12 - English