The list contains web-pages where you can find information on Ladakh and information that can be helpful for travellers to the region. Tour operators have not been listed.
For some more links and more comments on internet sources, pleas visit our forum.
 
"Mindful Travel" brochure at the Ladakh Project of ISEC
The brochure is a must read for anyone going to Ladakh. DO's & DONT's for travellers to Ladakh, ecological and cultural guidelines.

Altitude Tutorial by International Society for Mountain Medicine
A guide on preventing, diagnosing and treating Acute Mountain Sickness (AMS).

An article on Altitude Sickness at merc.com
Altitude sickness, acute mountain sickness (AMS), high-altitude cerebral edema (HACE), high-altitude pulmonary edema (HAPE). Prevention, symptoms, diagnosis, treatment.

Blank on the map
A site on NE Himalayas, Karakorum Range and Hindu Kush. A great source of maps and satellite images of the region!

Dates of festivals in Ladakh at ReachLadakh.com
Dates of some festivals in Ladakh (including monastic festivals) for a few upcoming years.

Ecotourism in Markha Valley
A site by Youth Association for Conservation and Development in Hemis High Altitude National Park. Information on Markha valley, local products and tourist based on home accommodation in the villages.

Friends of Likir
An initiative of setting up mini libraries for children of Ladakhi villages. The first library is running in Likir and the organization searches for sponsors of libraries in other places.

Friends of Lingshed
Information on an Austrian project of support of local community of Lingshed. Solar-School in Lingshed.

Guide on Safe Food for Travellers by WHO
Basic rules relating to food safety.

Gyalwang Drukpa
The official site of Gyalwang Drukpa - the head of Drukpa Lineage of the Tibetan Buddhism, regarded as the spiritual leader of Ladakh.

Health Information for Travellers to India at CDC.gov
Information on diseases found in India, prevention against infections and symptoms of the illnesses.

Hemis National Park @ indiawildliferesorts.com
Basic information on the park.

High Altitude Medicine Guide
Information on health issues for trevellers to high mountainous regions.

Himachal Road Transport Corporation
Check for buses on route Delhi-Manali-Keylong-Leh.

Indian and Tibetan Buddhist Art of the University of Vienna
Descriptions of some Ladakhi monasteries.

Indian Astronomical Observatory in Hanle
Information on Himalayan Chandra Telescope located in Hanle, SE Ladakh, at the altitude of 4500 metres.

Indian Railway Online Passenger Reservation System
Train reservation.

Indian Railways
Timetables, online reservation of trains in India. For Jammu (on the way to Srinagar) check train No 2413.

Indian Railways Passenger Reservation Enquiry
Indian train schedule, seat and berth availability.

Information on travel and health by World Health Organization
Disease distribution maps, annual reports on diseases, vaccination recommendations, preparations of the trip.

Inner Line Permits at Devil on Wheels
An article about permits required for travelling to some parts of Ladakh.

Jammu and Kashmir State Road Transport Corporation
Check for buses in J&K.

Ladakh and Zanskar Homestay
Information on home accommodation available in Ladakh. Where is it available? How to book?

Ladakh at WikiTravel.org
Basic information on Ladakh.

Ladakh Nuns Association
The site of Ladakhi nuns organization aming to empower female religious group of the region.

Ladakh Projects of Tibet Heritage Fund
THF is an NGO focusing on protecting heritage, particularly the traditional architecture, of Tibetan culture. It works on a few projects in Ladakh, including conservation of Old Town in Leh.

Leh at WikiTravel.org
Basic information on Leh and on approaching the city from the plaines of India.

MakeMyTrip.com
Online booking of Indian domestic and international flight, Indian railway and buses.

Official Website District Kargil, Ladakh, J&K, India
Basic information and statistics for Kargil District of Ladakh. Information on status of roads.

Official Website District Leh, Ladakh, J&K, India
Basic information and statistics for Leh District of Ladakh. Information on status of roads.

Reach Ladakh
A good deal of information on the region and its tourist attractions. Regional news.

Snow Leopard Conservancy - Ladakh
Information on actions regarding the conservation of Snow Leopard in Hemis National Park and in Zanskar.

Snow Leopard Conservancy India Trust
Information on the activity of the organization in Ladakh and Spiti and on snow leopard himself. Publications.

The Achi Association
A non-profit organization based in Switzerland involved in research and conservation of temples in Wanla and Kanji villages of Ladakh.

The International Association for Ladakh Studies (IALS)
An international organization for the research on Ladakh. You will find information on their publications, some publications on-line and many interesting links.

The Ladakh Confluence
The site of The Ladakh Confluence cultural festival. Information on the festival, Ladakh. Web-radio.

The Ladakh Project of The International Society for Ecology and Culture (ISEC)
ISEC has been working in Ladakh for some 30 years. It focuses on helping the Ladakhis in protecting their culture and traditional, ecological farming and on bringing to the tourist awarness on the richness of Ladakhi culture. It is a must to be visited site for anyone going to Ladakh!

The Ladakh Students Welfare Society
News from Ladakh and news related to the region.

The Official Website of Jammu and Kashmir Government, India
Basic information and statistics of the state which Ladakh is a part of.

The Sun School for Kargyak
A Czech organization that has built and maintains the school in Kargyak village, in Zanskar. Visit it to learn about the project, support it or volunteer in Kargyak!

Travel advices at The Foreign and Commonwealth Office, UK
Travel advisor for India at the UK Foreign and Commonwealth Office site. Advices for travelers including safety and security issues.

TrekZanskar.org - trek in Zanskar, with Zanskaris
A site for those, who wish to trek in Zanskar and want to rely rather on local community in organizing the trip then on big travel agencies from outside Ladakh. The site provides contact information to local guides and horsemen. It is a must see site for those who want to go to Zanskar!

VisitLadakh.com
Much information on the region; local news.

Zanskar Resource by Seb Mankelow
Seb visits Ladakh frequently since 1994, trekking there both in summer and winter. In this web sites he shares the experience and observations.

Zanskar.org
Many links to interesting sites on Ladakh and Zanskar.