## How to build the matter modeling model with appropriate tools?

- When we perform matter simulation with first-principles calculation, building a reasonable model always be the very first and important step. However, people utilize different tools to build their model on top of their background. I know some tools such as [VESTA][1] and [Materials Studio][2] from my computational condensed matter physics background. 

- The purpose that I post this question is to look for the complete list of model building tools from your backgrounds. I hope you can share your tools to build a model and list its common functions. And I hope this question and the expected answer will be beneficial for the whole matter modeling community.

- The answer presented [as this format][3] is appreciable.


  [1]: https://jp-minerals.org/vesta/en/
  [2]: https://www.3ds.com/products-services/biovia/products/molecular-modeling-simulation/biovia-materials-studio/
  [3]: https://mattermodeling.stackexchange.com/questions/1513/what-are-the-types-of-dft