Here's an itinerary of software that developers commonly use when building WordPress themes:

1. Code Editor: A good code editor is essential for writing and editing theme files. Popular options include:
   • Visual Studio Code
   • Sublime Text
   • Atom
   • PhpStorm
2. Local Development Environment: Set up a local development environment to work on your WordPress theme offline. Common tools for this purpose include:
   • XAMPP
   • MAMP
   • Local by Flywheel
   • DesktopServer
3. Version Control System: Use a version control system to track changes to your theme's code and collaborate with other developers. Git is the most widely used version control system, and platforms like GitHub, GitLab, and Bitbucket provide hosting and collaboration features.
4. Graphics Software: If your theme includes custom graphics or design elements, you may need graphics software to create and edit them. Popular options include:
   • Adobe Photoshop
   • Adobe Illustrator
   • Sketch
   • GIMP (free and open-source)
5. Browser Developer Tools: Browser developer tools are invaluable for debugging and testing your theme's frontend code. Most modern web browsers include built-in developer tools, such as:
   • Chrome DevTools
   • Firefox Developer Tools
   • Safari Web Inspector
6. FTP Client: When you're ready to deploy your theme to a live server, you'll need an FTP client to transfer files. Some popular FTP clients include:
   • FileZilla
   • Cyberduck
   • WinSCP
7. Debugging Tools: Debugging tools help you identify and fix issues in your theme's code. WordPress-specific debugging tools include:
   • Debug Bar
   • Query Monitor
   • WP Debugging
8. Image Optimization Tools: Optimizing images for the web is essential for improving site performance. Tools like these can help:
   • TinyPNG / TinyJPG
   • ImageOptim
   • Kraken.io
9. SEO Tools: To optimize your theme for search engines, consider using SEO tools like:
   • Yoast SEO
   • All in One SEO Pack
   • Rank Math
10. Accessibility Tools: Ensure your theme is accessible to users with disabilities by using accessibility testing tools such as:
    • WAVE Evaluation Tool
    • Axe DevTools
    • Accessibility Insights for Web

By using these software tools, you can streamline your WordPress theme development process and create high-quality, feature-rich themes efficiently.