The best free alternative to tutorialspoint is freeCodeCamp, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to tutorialspoint and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to tutorialspoint are Codecademy (Freemium), Coursera (Freemium), SoloLearn (Freemium) and W3Schools (Free).
Coderbyte is a place built for anyone to practice and perfect their programming skills. Challenges are added almost every day so you can work on applying your algorithmic thought process on any problem you want at anytime.