IDLE is described as 'Default IDE which come installed with the Python programming language. It aims to be simple and intuitive, and is especially useful for programmers just learning Python' and is an app in the Development category. There are more than 25 alternatives to IDLE for a variety of platforms, including Windows, Linux, Mac, BSD and Android. The best alternative is Eclipse, which is both free and Open Source. Other great apps like IDLE are PyCharm (Freemium, Open Source), IPython (Free, Open Source), Light Table (Free, Open Source) and Komodo IDE (Freemium).