Usually you will find bugs immediately after you release software. ;)

Is your objective to sell it? In that case, you need to find some testers to try it out, and maybe someone to edit/rewrite your instructions. It's possible to sell software on this site of course.

If your objective is to give it away, you could put it up using whatever web space or file sharing site, post the link, and just tell people it is a very early alpha release. They will undoubtedly find bugs.

Not sure how much free time I have, but I have done technical writing and editing etc.