is there a section on this forum where you can promote your apps or maybe wesbite for free, i know some sites allow this, but is it here?
You can't. You need to get 3 likes to become an established member. Established members can promote their sites / links in their signatures. Another option would be purchasing premium membership. Members with premium membership can promote their sites / links in their signatures as well. More here: https://www.digitalpoint.com/help/established