The Crystal theme comes with 15 built-in addons so that you can customize your theme very easily. The addons list image and the description is given below:

 
Clients Logo:

 
Contact Form 7:
Details about Contact Form 7 is here.
 
CounterUp:

 
Feature Box:

 
Gallery:
Details about Gallery is here.
 
Hero Area:

In this widget you will find two options. You can insert an image or a product query form. If you want to show a prodocut query form then, you need to create a contact form from the admin area. To know more how to create a contact form please visit here. A sample product query form is given below.

 
MailChimp Form:
Details about MailChimp here.
 
Post:

 
Pricing Table:

 
Section Title:

 
Service Box:

 
Slider:
Details about Slider is here.
 
Team:
Details about Team is here.
 
Testimonial:
Details about Slider is here.
 
Video PopUp: