Audacity – Simple Audio Editing & FX
Audacity is free, open source software for recording and editing sounds. It is available for Mac OS X, Microsoft Windows, GNU/Linux, and other operating systems. It is simple and easy to learn. Just be sure you get the LAME encoder for making MP3′s.

GIMP – The Photo Shop Of The Open Source World
GIMP is the leading photo editor in the open source world. It works like other (proprietary) raster editors including Adobe Photoshop, Jasc Paintshop Pro and Microsoft Paint. You can learn more about the software and even download a copy at http://gimp.org.

Daz Studio – 3D Figure Poser
Daz Studio is a very powerful 3D figure poser, and the best part about it is that it’s free. You can pose, light, and animate your figures in 3D space. Then, you can render detailed images or video right on your desktop computer. Daz also offers a variety of downloadable 3D models and other content in their store.