What are the software development communication and work-flow management tools trending right now?

Hi, my group is a couple university students studying CS, doing a group project for a course. We are allowed to use our own methods of communication and managing work-flow. We want to learn and get the hang of using whatever is trending in the workplace. Is it Github issues that is mainly used for managing to-do's now? Trello? What's for communication? Surely not email in the workplace for a software development team lol.