Most common for print & graphics File format are Ai, Eps, Psd, Indd, Docx. Pptx & Key for Presentation.
Ai, Eps, Psd & Indd are the most popular and most versatile file format on the market. It includes many tools that allow users to design with easily manage, print, customize, resize without lossing resolution etc. Also, support offline & online databse system.
Here is File format list with the specific file application.
For more details please see “What Software/Application need to edit Freepiker resources?”