Heather

Very easy install if you already have a slack account. I can see how it can make things much easier for bigger companies.

Corey from the Heather team here. Heather is a simple way for teams to manage their vacation and org chart right from Slack. Using a natural-language chat interface you can quickly request and approve vacation, check your balance at any point in the future and ask interesting questions like, "Who works in the Sales department." We'd love to get some feedback to help us build Heather into a great tool for your team. * PH peeps get their trial extended to 90 days and 50% off for the 1st year.