Joomla must-have installation list

This is the list that i find that it is a MUST-HAVE extensions for starting a Joomla project:
(last review: 20th July, 2015)

• K2 (Component, Plugin, Module)
  This is a replacement of original Joomla article system which provide you a more flexible way to create content.
  
  K2 comes with some modules such as k2_content to let you display your k2 items in various way you like.
• Multiple-images-for-k2 (Plugin)
  Default, each k2 items can only insert 1 image, it enables K2 to insert more than 1 image per item.
• Flexi Custom Code (Module)
  It is a complete replacement of the built-in sucky Custom-HTML module. Say goodbye the Custom-HTML module~~. Now you can use php, css and js in your custom module WITHIN THE JOOMLA FRAMEWORK.
  
  As i introduced in my previous article, it saves your life in case of your Joomla project is full of custom requirements which cannot be done in normal way.
  
  
• Fabrik (Component, Plugin, Module)
  Fabrik gives you the power to create forms and tables that run inside Joomla without requiring knowledge of mySQL and PHP.
  
• Blank Component (Component)
  Simply let you create a blank module only section without creating a zero article category
  
  
• Modules Anywhere (Plugin, Editor button plugin)
  With this plugin, you can force display any module to anywhere you like. for example sometimes you would like to force display a module in another location... such as.. k2 Item...
• ACL Manager (paid) (Component)
  The complete replacement of built-in ACL manager. It makes the ACL interface much easier to use. The built-in ACL system is very confuse and hard to use. Although it is not free, it's worth to pay.
• Advanced Module Manager (Component, Plugin)
  A replacement of original module manager. It provide a more detail way to manage your modules. The free version is good enough.
  

i will keep updating this list once i discovered any new useful extensions. Hope those extensions helps you to develop Joomla site