Flippity is a free website that allows you to turn Google spreadsheets into interactive digital manipulatives, activities, and tools. The site offers a wide range of ready-made templates that you can copy and customize. 

Rating: A

Ease of use: Tools ranges from ⭐⭐ to ⭐⭐⭐

Empowering Students: ✏️🧠🧑‍🤝‍🧑

Freebies/Pricing (subject to change): Fully free