That is:
Metastock with eSignal
MyTrack with AmiBroker
MyTrack with Sierra Chart
MyTrack with Fibonacci Trader
DtnIq with AmiBroker
DtnIq with Ensign.
Not to speak of QuoteTracker...
MyTrack has 16 days of 1 minute bars for MSFT and IBM: I have just tried it. I suppose it is the same for all stocks.
MyTrack's feed is probably as good as eSignal's: it is very likely that different performance depends on Internet connection and routing.
One caveat: 10yrs Notes futures, have data in 1/32, instead of 1/32,5.
MyTrack has one subscriprition for all their feed (FOREX included): by paying exchange fees you bet real time data, but still get delayed for all the other exchanges thay have. Also, no area fees, no surcharges to have (say) stocks and commodities together; no surcharges to mix delayed and real time.
I use them, because I can pay monthly.
IqFeed has longer history available (tick by tick also available) + better news, but you have to pay one year to get decent rate.
My experience with MyTrack's customer service was better than with IqFeed's.
Regarding real time charting software: skipped Metastock (I admit I gave it a try getting it through WinMX) and chose AmiBroker. For just 200 $ AB is definitely more flexible and has much better support available directly from the developer.