I also work as IT Consultant / administrator in small companies. And many times I need a URL or something on other Computers, Smartphones or whatever device which are not mine. So how to share it without to signup for any services on this Device?
I created ccv.ninja its just a PIN protected list. Easy and free. Create it, fill it, don't forget it. Its also saving the created List to your device as cookie. You can also just share it.
I use it now daily. Its now in Alpha and more like a prototype but its helping me a a lot in my daily work.