Buffalo Tours - Offers day trip, kayaking, and trekking tours nationwide. Emeraude Cruises - A 37-cabin cruise vessel operating daily in Halong Bay with one night on board. Accommodates up to 74 passengers. Ivivu - Hotel booking service. [Vietnamese, English; May not display properly with some browsers.] Indochina Sails - Offer cruises on Halong Bay by junk. Vietnam-visa.org - Offering Vietnam visa and immigration services. Flyvietnam.com - Offering real-time flight schedule and e-tickets for domestic and international airlines. Asia King Travel - Customized, privately guided tours, group travel and volunteer holidays in Vietnam, Cambodia and Laos. Dalat Trip Ltd - Offer biking, trekking and short tour in Dalat. VietnamAirfare.com - Offering air tickets booking for domestic and international flights in Vietnam. Tuan Linh Travel - Provides full travel information services for travelers to Vietnam. Vietnamvisabooking.com - Provides the urgent Vietnam visa services within few hours, full information about visa, immigration policies and entry regulations Vietnam Ecotourism - Source for information on ecotravel and tours. Includes destinations, accommodation and resources. Vietnamvisa.org - A local agency offering pre-approved letter service for visa on arrival.