These are products I thought were cool that I have seen, seen on the internet and it looked interesting, tried, recommend, or I think would come in handy in a pinch. This is by no means an exhaustive list.
Pretty much every product has pros and cons.
Build Hotzone or wireless cloud
Gives wider service area Wi-Fi than a hotspot.
22Mbps on 10 hops (?), 3rd Generation. "50-1000x better than other mesh products"
not exactly sure if metrofi belongs in this list. citywide wireless cloud solutions can cost several million dollars.