BuddyHR Absences is the core product of BuddyHR where your team can log their leaves and plan work accordingly. There's also a destination map to see places your team has been on vacations to, leave approval mechanism in case you need it, and Slack integration so you can add leaves and check on existing ones right in the middle of a conversation.
We're a small marketing agency with a very few employees. So we need a simple tool to track leaves and absences. BuddyHR helps with that. I personally love how it notifies me via slack and email so I don't have to open yet another tab in my browser.
I've been using it since the very early beta on a request of my friend. Never though that it would be useful for such a small enterprise. But it is. Good luck to you, guys!