FASTyle is an all-in-one suite which dramatically improves and speeds up assets management, including templates, stylesheets and javascripts. FASTyle is equipped with a powerful editor and asset manager, giving you fine control over theming development in a single browser tab.

Notable features:

• AJAX interface with quick templates, stylesheets and javascripts management;
  
• semantic template listing;
  
• full page and quick mode;
  
• diff comparator against assets' original versions;
  
• Sublime Text keymap;
  
• revamped find and replace functionality;
  
• custom handmade theme;
  
• state memory.
  

From the original idea of Eric J.. Thank you Eric.

To install, simply upload and Install & Activate from the plugin list.

FASTyle is compatible with MyBB 1.8 only.