Some Scholarships that I got, and therefore highly encourage others to apply:
Cecil King Travel Scholarship by London Mathematical Society Link (during PhD for UK based students)
Prize Scholarship by Merton College Link (for Merton College Graduate students)
James Buckee Scholarship by Merton College Link (for PhD funding in Theoretical Physics)
Director's Gold Medal by IIT Kanpur Link for various Convocation Awards (nominations at the end of degree at IIT Kanpur)
Bhagwani Devi Maheswari Gold Medal by IIT Kanpur (for graduating students at IIT Kanpur)
SN Bose Travel Scholarship Link (during undergraduate degree to travel to (Harvard) the States for reserach internship)