General Backpacking:

Lonely Planet: Lonely Planet travel guides and travel information.

Rough Guides: World travel guide and reference book publisher.

The Backpacker : Backpacking resource featuring hundreds of backpacking guides plus the famous world beer index.’

Hostels & Accomodation:

Hostelworld.com: The most popular online hostel network. Search over 20,000 Hostels in over 170 Countries.

Hostels.com: The biggest hostel network online. Find any hostel, anywhere in the world.

Travel Blogs:

foXnoMad: Travel Smarter!
The Professional Hobo: Adventures of a Girl with No Fixed Address

Books & Travel accessories:

Amazon.com: Online shopping from the worlds biggest online shop.