Codea is an open-ended coding application that allows students to create innovative graphics, attractive visuals, and interactive games using the programming language Lua. With this app, they can write code using simple touch commands and easily incorporate images, characters, and even sounds from the menu. 

Mimo is a fantastic app and one of the best free coding apps to sharpen students' coding skills. Students may learn crucial coding concepts at their own pace. 

Scratch is a visual programming language that allows students to create their own interactive stories, games, and animations. As students design Scratch projects, they learn to think creatively, reason systematically, and work collaboratively. 

W3Schools is a school for web developers, covering all aspects of web development, including HTML tutorials, CSS tutorials, and JavaScript tutorials.