RS3 - similar to system tray RSS Readers, only RS3 also expands to full page (this is a transparent page). Drag and drop feeds, filter watchlist terms that pop up toast, sticky windows, intergrates with adding feeds using IE.
Scouta - bookmark and tag websites, audio, video and you are recommended other sites, also form groups (each had a podcast feed)…here’s an explanation. The recommendation I suppose is similar to StumbleUpon, as you explicitly tell it what you like…see more.
Ning (update) - it’s been a while since their initial release, but now they really do mean a novice can create any type of social network application…seems more inline with the simplicity of website creators like SiteKreator and Weebly.
MyPictr - resize your image for your profiles in social networks, etc…
vFlyer - create professional looking flyers (choice of themes) and even submit it to a classifieds site like ebay and Edgeio…see the tutorial. Also manage your flyers, get stats.
Here is an example of selling a car. Also promoting itself as classified ads widgets. See Letterpop for Newsletters.