If you are considering Thrive Themes, you can see in this post all the blocks available in their theme Shapeshift, part of their theme called the Theme builder.
There are more design elements than these. You can see the Thrive Architect elements, and the Thrive leads opt-ins.
Here's are all the page blocks in Shapeshift:
Articles
Steps
Product Highlight
Hero Area
Text/Content
Testimonials
Team
About
Call to Action
Benefits and Features
ShapeShift Theme Smart
Lead Generation
ShapeShift Theme Smart
List Content
ShapeShift Theme Smart
Pricing Table
ShapeShift Theme Smart
Statistics
ShapeShift Theme Smart
Contact
hapeShift Theme Smart
FAQ
ShapeShift Theme Smart
Illustrated List
ShapeShift Theme Smart
