IS there any software to improve my speaking skills?

I assume that your main interest is in improving your pronunciation. I don't think that there is any software which can successfully evaluate your speech for you. There are many programs which will help you improve pronunciation by example but all of them, of course, depend on your own ear and accuracy in repetition. Such programs may either be found as online courses or (more usually) as offline sets of CDs/tapes. Many are really little more than 'phrase books' which will give you the correct pronunciation of a fairly limited number of common words and phrases. The better courses tend to be quite expensive but are more worthwhile. Linguaphone courses are well-established but somewhat out of date; Rosetta Stone is a newer and, many say, a better system but both are quite costly. This page has some very elementary tips which may be helpful: