WebStorm is a lightweight yet powerful JavaScript IDE, perfectly equipped for client-side development and server-side development with Node.js. Developed by JetBrains
License: Commercial
Aptana Studio is a free, open-source IDE that focuses on web development with a strong emphasis on flexibility and customization, while WebStorm is a commercial IDE that provides advanced features specifically tailored for JavaScript and web development, offering a more polished user experience and powerful tools.