Its the bitcoin-core wallet
Long time since I used that. It surely should show you the address just by double clicking on the alias or something like that.
Also, there should be a command to execute form the "Debug" command line - like GetAddressGroupings or something that dumps all the addresses.
Somebody will pipe up that knows it.
Goto Transactions and look at the properties of the the item in question. If it was broadcasted it would say something like "Broadcasted transaction across x nodes" or something like that. If it has not been broadcasted, it would either say Offline or transaction not yet broadcasted. Once it is broadcasted from your wallet, you should be able to use either address (or the transaction id) to find it through blockchain.info.
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