Planniversary - Never forget a gift or a birthday / anniversary again 🎁📆

Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.

hbd - birthday reminders for the people you actually care about.

Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.

Slack Birthday Bot - Slack bot for celebrating birthdays

Pomodone - Pomodone is the easiest way to track your workflow using Pomodoro technique, on top of your current task management service.