Does anybody know any software or any way so that I can change my microphone jack, so it functions as an audio out jack so that I can plug my speakers into it?
No, not without hardware modification, like soldering and circuit modification. You can’t just use software to modify hardware electronic circuitry. A mic jack is an input, you can’t change it into an output.
Your best bet is to use a USB sound card, like this: http://www.newegg.com/Product/Product.aspx?Item=N82E16829128004
It might depend on your sound card. I know some Realtek cards have this capability built into them and you can change it from an input jack to output right in their little settings utility.
On a related note, speakers and microphones work essentially the same way. You can use headphones as a cheap, (very) low quality microphone in a pinch :eyebrowlift2:
That is a true statement. It seems silly, and I didn’t believe it at first when I started working with audio equipment but low and behold…
Just trying it the other way doesn’t work so well…