See Douglas C. Schmidt website for more information about ACE/TAO. The quality of ACE/TAO is monitored through our distributed scoreboard
ACE is a C++ framework for implementing distributed and networked applications, TAO is a C++ implementation of the OMG's CORBA standard. The main home page is here.
All support on github is best effort, when you require a guaranteed response consider hiring one of the commercial companies who provide support and services for ACE/TAO.