Code Exercises is described as 'Website to help developers improve their programming skills by practising simple coding exercises. The target audience is Software Engineers, Test Automation Engineers, or anyone curious about computer programming' and is an website in the Development category. There are nine alternatives to Code Exercises, not only websites but also apps for Terminal. The best alternative is exercism, which is both free and Open Source. Other great sites and apps similar to Code Exercises are Codewars (Freemium), HackerRank (Free Personal), Project Euler (Free) and LeetCode (Freemium).
LeetCode is a platform for learning and improving coding skills with the goal of being fully prepared for programming interviews. Choose problems to solve from categories such as System Design, Algorithms and Database, join code contests and engage in mock interviews.
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.
InterviewBit gamifies the experience of practicing for your interview and includes lots of sample problems. The problems have been categorized into topics and then micro-concepts within topics. Each problems have hints and editorials with them.