Lonely Planet Publications Pty Ltd has their Sydney City Guide (iTunes Link) in the iTunes App Store for FREE (regularly $5.99) for a limited time.

Australia’s first city opens its arms, with Lonely Planet’s Sydney City Guide on your iPhone. Known to some as Harbour City (for its unsurpassed waterside setting) and to others as Emerald City (for its abundant greenery), we prefer to know it as Sin City, a place replete with temptations. From the slinky bars and modish eateries of Darlinghurst and Surry Hills to the stunning (and accessible) natural wonders of the Blue Mountains, Pacific Coast and Hawkesbury River, Sydney could seduce even the most jaded jetsetter.

Of course, the world knows all about Sydney’s iconic attractions – the Opera House, the Harbour Bridge, the Gay and Lesbian Mardi Gras – but how to tap into its more subterranean delights? Well, with this app, one tap it all it takes: you’ll be kayaking off eucalypt-clad headlands in Middle Harbour, slurping down Singapore-style chilli mud crab in some neighbourhood chophouse or catching a high-octane NRL final at Telstra Stadium. Too easy!