Various wx info can be found on-line easily enough.
The more difficult part is the overlay of the aircraft. It typically requires a data feed, usually either ACARS or Iridium. You can go with one of those free ATC websites but you get everyone else's flights thrown in there too, not good if you have a big fleet. They also have a tendency to look like crap too with annoying adverts and banners plus a time-lag.
This is a good example of one covering Malaysia / Sing
Flightradar24.com - Live flight tracker! ..relatively uncluttered display too.
There are lots of options out there but they don't come cheap as the aircraft hardware is where the cash gets burned up. A basic set-up with STC's, hardware and install will set you back at least 30k USD / tail and then throw in the monthly data service.
D.O.G