Sound Bible is a great resource to find a variety of sound effects for post production sound mixing. Read more about how to use it in this article.
QuickTime Player can perform a lot of different operations. From video playback and to even screen capturing; see what features this program has to offer
One of ways you can mix layers together is by changing their blending modes. In this blog we see how to use them in Adobe After Effects.
This blog covers different export formats for sequences in Adobe Premiere Pro CS6.