Free Code Camp's open source community help you build a job-worthy portfolio of real apps used by real people, while helping nonprofits.




AceCoder is described as 'Invisible desktop app that instantly delivers solutions to any coding interview question' and is an app in the development category. There are more than 10 alternatives to AceCoder for a variety of platforms, including Web-based, Android, iPhone, Self-Hosted and Terminal apps. The best AceCoder alternative is freeCodeCamp, which is both free and Open Source. Other great apps like AceCoder are Codecademy, exercism, W3Schools and LeetCode.
Free Code Camp's open source community help you build a job-worthy portfolio of real apps used by real people, while helping nonprofits.




Explore free interactive coding courses in web development, data science, and various languages. Codecademy offers a fun, collaborative learning environment with community support, personalized paths, skill assessments, and more, covering both foundational and advanced concepts.



Download and solve practice problems in over 30 different languages. For code newbies and experienced programmers.


W3Schools is a web developers information website, with tutorials and references on web development languages such as HTML, CSS, JavaScript, PHP, SQL, and JQuery, covering most aspects of web programming.


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.


Free tutorials and reference manuals with examples for Computer Fundamentals, JSF, C Sharp, Flex, GWT, PL/SQL, Eclipse, JUnit, Pascal, Maven, Scala, Spring, Struts 2, HTML5, ANT, iBATIS, Django, JSP, JAVA, JDBC, AJAX, WAP, SQL, MySQL, C/C++, PERL, PHP, Ruby, Ruby on Rails...

A fun social platform for hackers to solve interesting puzzles, build quick hacks, code game bots and collaborate to solve real-world challenges.





Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve.


CodinGame is a challenge-based training platform for programmers where you can play with the hottest programming topics.


An AI-powered platform offering interactive courses for developers, featuring instant code feedback, mock interviews, adaptive learning paths, and 'Explain with AI' for on-demand explanations. Ideal for onboarding, upskilling, and mastering programming languages.



Learn and Practice on almost all coding interview questions asked historically and get referred to the best tech companies.