Websites // probably infinite to be updated more..............

topcoder
hackerrank
hackerearth
codeforces
codechef
euler.net or project euler
timus
spoj
codewars

official docs of langauges and technologies
books
geeksforgeeks
programminghub
freecodecamp
w3schools.com and w3schools.in
tutorialspoint
javatpoint
codeacademy
leetcode
coursera
edx
mit ocw
udacity
stanford youtube
udemy pirated
interviewbit
microsoft docs for its technnologies
https://learnxinyminutes.com
https://www.hackerearth.com/practice/notes/trending/

cppreference.com
https://devdocs.io/cpp/
cplusplus.com
microsoft docs for c++

torrent
kikmic.ca
udemyoff.com
freetutorialsus.com
realdiscount.com
smartybro.com