2sxc is released as open-source on CodePlex. These are your most important downloads:
The latest official version, ready for production and used on hundreds of sites!
Fully functional Apps containing image galleries, FAQ and more. They are ready to use, and you can easily adapt them to your needs.
Basic content templates for images, videos and more. 2sxc will offer to install them automatically - and you can also d so manually through Admin > Import.