Sling is described as 'free shift scheduling and communication software. It is built around four main features - shifts, messages, newsfeeds and tasks - making it possible for managers to organize all aspects of their work on a single platform' and is an website in the Business & Commerce category. There are eight alternatives to Sling, not only websites but also apps for a variety of platforms, including Android, iPhone, SaaS and Mac. The best alternative is When I Work. It's not free, so if you're looking for a free alternative, you could try OpenSimSim - Employee Scheduler or Homebase. Other great sites and apps similar to Sling are ShiftPlanning (Paid), TeamCal (Paid), Findmyshift (Paid) and Push Operations (Paid).
Online employee scheduling from When I Work is easy and fast. Send email and text message alerts about upcoming shifts and schedule changes. Managers and employees can use the iPhone or Android App to manage the work schedule and monitor shift swap, drop and time-off requests.
Manage staff's schedules from anywhere, any time on any computer. Swap shifts at the last minute, text your staff, approve time-off, and watch labour costs. Free for a month, there's nothing to install, nothing to download and no credit card required.