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.
Explain reader-visible product updates with links to the work behind them.
Your stakeholders get clear release notes backed by code changes and completed tickets, with links to the work behind each update.
Explain completed product changes in a stakeholder release email.
Your release contacts get a short note with links to completed issues, while you get a copy and any gaps that need attention.
Draft release highlights from code and tickets for product review.
Your draft release gets concise notes backed by code and tickets, plus questions to settle before you publish.