Google Contacts, the address book built into Gmail, lets you keep track of all your contacts, see when you last interacted with them, and more.
Send stakeholders a digest after approved release notes go live.
Your stakeholders get key changes and action items by email, with a link to the full release note page.
Compare release work and post a changelog draft for approval.
You get a release changelog draft on your review issue, with clear features and fixes linked to the completed work behind them.