IPVMU Certified | 02/13/15 04:01pm
You could reflash the firmware on your HID Edges to be the 'Edge SOLO' devices. It will give you a free access platform, but the biggest downside is that all 5 controllers will be unrelated. You'll essentially have 5 different access systems. (Tasks like credential enrollment and schedule changes will need to take place 5 times for the 'entire system' to be updated.)
See our review and test of that free software: Testing HID Edge Solo
Unlike Free VMS Software, there are no 'free access' softwares that are agnostic toward a proprietary controller or interface hardware. Even products like Axis' free Entry Manager only works with the A1001 controller.
Sorry, none that I know of. I do know that the Edge product line was designed to be monitored and controlled by a central station. You should be able to find one that can temporarily host them for you at a very reasonable cost. If I can think of something I will hit you back.