What is your price range?
Such tools do exist for Windows Mobile, but they do not come cheap, with SPB Kiosk Engine, for example, priced at $985.00 despite being not being developed for the past two years. The good news is that the price tag covers 100 licenses/devices, and you may be able to negotiate for a smaller purchase based on the number of devices your company uses.
P.S. Yes, free alternatives exist, but I have yet to find one that was not trivial to circumvent.