Metacode is described as 'Code faster in natural language. Metacode converts natural language into code in realtime, so you don't have to switch out of your text editor to look up code' and is an app in the Development category. There are nine alternatives to Metacode for a variety of platforms, including Mac, Windows, Linux, Online / Web-based and iPhone. The best alternative is Atom, which is both free and Open Source. Other great apps like Metacode are Sublime Text (Free Personal), Bluefish Editor (Free, Open Source), Xcode (Free) and Graviton Editor (Free, Open Source).
Bluefish is a powerful editor targeted towards programmers and webdesigners, with many options to write websites, scripts and programming code. Bluefish supports many programming and markup languages, and it focuses on editing dynamic and interactive websites.
Judge0 IDE is a free and open-source online code editor that allows you to write and execute code from a rich set of languages. It's perfect for anybody who just wants to quickly write and run some code without opening a full-featured IDE on their computer.