One of the most popular email services, Gmail keeps track of all your emails with threaded conversations, tags, and Google-powered search to find any message you need.
Send the maker one email with agreed creative revisions.
Your maker gets the agreed fixes by email after the review lead closes the thread. The proof link and next deadline come with them.
Remind creative assignees of due work and list tasks with unreachable owners.
Your assignees get due date reminder emails, and you see which tasks need your help reaching an owner.