[App_rpt-users] Wireless links

This may be viewed as an off topic, but I think it's worth talking about since it has to do with building our systems out. What is out there that is affordable for hams to connect our sites using microwave or some sort of non line of site technology? I would like to link our sites together when there is not a commercial internet connection available. Also this is a concern for keeping a network up and connected in the absence of commercial broadband due to natural or man made disaster.