Wikitravel Nepal - Wide-ranging guide covers a lot of information
The Library of Congress - Country Study for Nepal - Equivalent to a university 101 course, but well indexed for easy access.
Everest News - This nice site collects information from all activity on Mount Everest
The Lonely Planet - The Lonely Planet publisher's Nepal page.
The Rough Guide to Nepal - Excellent guide and very useful web page.
Himal Magazine - South Asia's first investigative magazine features excellent writing.
The CIWEC Travel Medicine Clinic - located in Kathmandu. Highly recommended site, authoritative information.
High Altitude Medicine Guide - Non-profit group with excellent information about high-altitude travel.
Sherpa Adventure Gear - The finest selection in quality outdoor and mountaineering gear.