Microsoft Project Professional 2016 is a professional business tool that helps create business projects in collaboration with others. It comprises all Project Standard features, and also resource management, collaboration tools, time-sheets, SharePoint task sync, etc. You can download it for free for Windows based system supporting 64 bit architecture. Setup file is completely standalone and also its an offline installer. Microsoft Project 2016 includes enhanced features along with professional project management approach.
Here’s the installation guide for Microsoft Project — https://docs.google.com/document/d/18hFI52MwC5vUiDDW1RBN1c2mu_y56B49CEpOoTZ7rWs/edit?usp=sharing