Law StackExchange A question and answer website for issues pertaining to law (not necessarily Indian law)
Indian kanoon A website providing nice facility for searching judgements of various courts including the High Courts and the Hon'ble Supreme Court
Right to Information Act, 2005
RTI Online The official website for e-filing RTI applications in central public authorities
How to use RTI Act effectively YouTube link to a talk by Shri Shailesh Gandhi
RTI Act : Authentic interpretation of the statute A book by Shri Shailesh Gandhi and Shri Pralhad Kachare
Tilting the balance of power : adjudicating the RTI Act A book by Satark Nagrik Sangathan and RaaG. Contains a compilation of several judgments of the Supreme Court and the High Courts on the RTI Act.
MathOverflow A Q&A site for advanced mathematics
String Theory Wiki A compilation of resources on String theory and subfields
Arxitics A nice website with advanced options for searching arXiv
List of resources for various topics in Physics