MQL 3rd party tools (debugger)

1) Does anybody know the 3rd party tools for working with MQL code? The MetaEditor that comes with MT4 is too far from perfection, there is no debugger, server emulator etc. I guess, people like me who work in Microsoft or Borland programming environment (Visual Studio, C++ Builder, Delphi) feel like riding a bike after the Porsche car.

2) Did anybody try to use the mainstream programming systems mentioned above for creating the MT add-ons?

You can if you want. In fact, just spin up your code as a DLL and reference it from MetaTrader.

But to answer your question, I'm not aware of anything more sophisticated than print/log statements being used to debug.

Yes, I know this way, but how to access the MT4 library e.g. from Delphi?
The level of integration will remain very low, just transmitting several parameters to/from MT4/DLL.
It would be nice to process the *.mq4 text with something that allows execute code step-by-step, view values at breakpoints or at least call the functions like iMA(...) from DLL.

MT3 had an API, so making calls from external code was possible. MT4 doesn't and it's been stated that one will not be developed.

You can access a DLL from Metatrader, but can't access Metatrader from a DLL (or executable).

I just don't think you've got the hooks to do what you're trying to do.