How to edit a project with a team?

Question

Work organization

The essence of the question is this: I always wrote everything myself and alone, but it's time to organize a team. And the question arises: with the help of which you can create projects not for one, but for several people (who are not in the same city). That is, what to use? How to understand someone else's code? Etc.

Answer 1

For communication and work organization of Slack+Trello, for the code itself, what is more convenient for team members....