Use ACDSee Photo Manager.
ACDSee Photo Editor - built into ACDSee Pro. Press F when viewing the photo to open the editor.
GIMP Photo Editor - free editor similar to PhotoShop
PhotoShop - the grand master of photo editing software
ACDSee Photo Manager - can create a slide show of photos, and you can make it into a stand-alone program that does not need ACDSee to view it.
Use Picasa Photo Manager locally to select and upload the photos you want to Picasa Web where they can be viewed as a slide show by anyone.