Some cool apps for iPhone/iTouch you may like

Designer-

Chanel
Gucci
D&G
Ralph Lauren

High Street-

Next
Zara
Oasis
Warehouse
All Saints

Magazines-

Elle Canada
Elle Horoscopes
Vogue Stylist
Teen Vogue
Elle Shopping guide
Grazia.FR (if you dabble with French)
Nylon
Seventeen fashion finder

Other fashion/style applications-

ChicFeed (where you get some of the Best pics from sites including The Sartorialist & lookbook.nu)
Net-a-porter
F Network- offering a huge range of designers 2010 s/s catwalks in video form.