xfdashboard provides a GNOME shell dashboard like interface for use with Xfce desktop. It can be configured to run to any keyboard shortcut and when executed provides an overview of applications currently open enabling the user to switch between different applications. The search feature works like Xfce's app finder which makes it convenient to search for and start applications.
The latest version of the xfdashboard will be available in updates-testing repository for Fedora 19 and Fedora 20 soon. The packages are building in koji and will be submitted for testing soon.
The new version (0.1.4) includes support for themes. From the git changelog,
New feature: Add support for theming with CSS. A default theme called 'xfdashboard' will be installed and is a CSS version of the previously hard-coded style. You can now develop and tweak the appearance you like.