IIT-JEE sites by respective IIT's, can be viewed at the JEE subdomain of the various IIT websites.
BT provides scholarships to students meritorious in most of these Olympiads, as mentioned in the Scholarship / Awards section.
Organised by Tata Institute of Fundamental Research & HBCSE , IAPT, IACT, and approved by the government, these olympiads give the students a chance to learn,& compete at the same time. They include 2 rounds of examinations followed by orientation and selection camp for the Indian National.Team, who represent India in these academic Olympiads to compete with students from other countries.