there is no such system in Europe. to be correctly - there were several attempts to do that (SelfMadeFly etc) - but actually it's not working. we (airline commercials) and charter brokers (Chapman Freeborn, AirSea Broker/Swiss Global Cargo etc) have established good and close relationship between us, they trust us, we trust them (f.e. I'm ready to order our operations to dispatch a charter of US$120.000 worth for Chapman Freeborn even if I have no signed contract for that, just a verbal confirmation from them coming at the midnight time, and they know that we will do our best and will be flexible on any changes, like final destination change in 45 minutes before ETD).
the main working tools are phone and SITA, and I really doubt if anything will change during next 5-10 years.
in many cases important things need to be solved in few minutes and only trust and close relationship may help, not machines and internet.