It also possible to overlay a calendar, text or info taken from exif/iptc/xmp fields on your wallpapers. A new wallpaper can be set on windows startup, at regular intervals or manually when you press a hotkey or double click on its icon. Wallpaper Slideshow is simple to use, intuitive and complete with full context-sensitive help.

Key features include:
User friendly interface with full context-sensitive help
Displays an unlimited number of images
Displays images randomly or sequentially
Supports JPG, GIF, PNG, TIF, BMP file formats.
Can change wallpaper automatically after a specified time period (e.g. every 60 minutes)
Can change wallpaper on every Windows startup
Automatically resizes images to fit your screen size, it has advanced options to limit resize of small images or to fill the screen without distorting images.
High quality image resize (bicubic with prefilter)
Can use a different background color for each wallpaper
Use a system tray icon for an easy control of the software
Ability to hide your Windows desktop icons
Display a preview of selected wallpapers
Multi monitor support. Each monitor can have a different wallpaper or a single wallpaper can be spanned on all monitors.
Smooth wallpaper change using a dissolve transition effect
Can display custom captions with Exif,IPTC,XMP metadata support
Can overlay on wallpapers a monthly calendar
Can save/restore desktop icons positions
Hotkeys to quickly change wallpaper or start the screen saver
PlugIns support
Easy install/uninstall

Home Page - http://www.gphotoshow.com/