Useful Links of different websites for Exams Preparation

Download NCERT Texts as PDF. 
Download NIOS Online Materials. 
Download IGNOU Books. 
Download Yojana and Kurukshetra Magazines. 
Official Website of UPSC. 
Press Information Bureau Website, for government updates. 
IDSA website for Defense and Foreign relations. 
Ministry of Environment and Forests.
Ministry of External Affairs.
Governance & Administration.