xScape Theme Framework is state of the art system for creating and powering themes in WordPress. It has wide range of features built into the framework core including extend modules, widgets, menu designer, layout and templates manager and much more.
Images upload and download is implemented with very fast and reliable resizing and caching of smaller images. Framework implements highly advanced control panel system that spans over several panel to cover wide range of options. Other side of framework is wide range of functionalities built in for SEO, navigation, widgets, layout control, jQuery powered effects and much more. Each theme contains unique features that framework allows to be implemented on top of built in features. You can check out specific themes pages for more details including links to demo websites.
xScape Themes:
http://www.dev4press.com/themes/
xScape Demos:
http://xscape.info/
