Issuu.com helps one to download your favourite magazine in PDF format. It is like online library where people upload their publications for others to view or Download. It has many e-books, which can be downloaded for reading.
Indian Readers might get disappointed as there are not much Desi Magazines to choose from, but still it has pretty much huge collection of International Magazines which you can always download & read.
Great way to use your Android Tablet for reading your Magazine