Guide to not so free and open social networks for links

We just want to know what are the online communities around social networks for links. They must not be very free and open, so that here we have all solutions that do not go here. None of the software used must be Free Software and Open Source software. The service must be open to all free of charge. There must be categories for no plans to implement export your links to a file and sites that do allow that.

export but no free software

 * jots

no export and no free software

 * FeedMeLinks the software used is not free or there is no way to find out
 * delicious proprietary software, many tools
 * simpy
 * spurl
 * furl

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