Vacation Tracker for Slack helps your team request, approve and manage leaves. Get set up in minutes, and accurately roadmap future work knowing who'll be in the office when.
I've seen similar products, not none that matches the price/features set VacationTracker offers. Constantly updated with new features and a very responsive team behind it makes a great he difference.
Our company uses it for almost a year, and honesty, can't imagine using anything else for this.
Easy to use. Makes vacation/holidays/sick and off days management a breeze, both for the management and employees.