Hi Saifi and Pardhu, I use festival (http://www.cstr.ed.ac.uk/projects/festival/) with Carnival GUI. This might already be installed on your machine, check your packages.
And there are a lot of other softwares too. See http://sound.condorow.net/speech.html Googling will get you a lot of options. By speech API, do you mean a speech recognition software? Then yes, Sphinx from CMU Festival is a API(in C++) too, for text-to-speech conversion. Hope it that helps -- Satish
