Kathmandu in detail
Nepal Tourism Board (www.welcomenepal.com) Government site.
Visit Nepal (www.visitnepal.com) Comprehensive private website with detailed travel tips.
Lonely Planet (www.lonelyplanet.com/nepal) Hotel bookings, traveller forum and more.
Inside Himalayas (www.insidehimalayas.com) Online magazine and blog devoted to travel in Nepal.
kimkim (www.kimkim.com) Booking platform that has lots of good background articles on Nepal.