Instasaver is an online tool which lets you create screensavers from your photo collection. You can also covert those amazing Flickt photos as your screen saver in few clicks using this tool.
Using this tool is pretty easy, Just give a name to the screensaver, upload your photos or get photos from Flickr and your screensaver is ready. You can add animation effects and transitions to the screensaver.
You will get the standalone version of the screensaver which you can install and also distribute among your friends. [Source]