Twitter's Trends feature will begin to display lists customized for each user based on the feeds that user follows, the company said Tuesday.
Facebook took its App Center live on Thursday at a slick media event in San Francisco, announcing a handful of previously undisclosed features.
Foursquare has launched a major redesign of its app for the iPhone and Android devices, incorporating features from social discovery and local search.
Facebook may buy facial recognition services provider Face.com, underscoring the importance of that technology in social applications.
Facebook will settle a class-action lawsuit in California that accused it of appropriating its users' likenesses for its Sponsored Stories advertising feature.
The Supreme Court has declined to consider the petition of Joel Tenenbaum, a former doctoral student at Boston University who faces a fine of $675,000 for illegally downloading songs.
Google will begin in the next few days to incorporate the "knowledge graph" it has been building for two years into its search results.
Twitter says it will begin delivering a weekly email digest to highlight for users the tweets they are most likely to be interested in.
The California assembly passed a bill on Thursday that prevents employers from demanding job applicants' passwords for accounts on Facebook or other social networking sites.
The U.S. Federal Trade Commission has launched a probe of Facebook's proposed acquisition of Instagram that could delay the closing of the deal.
Facebook said Wednesday that it will launch an App Center where users can browse "high-quality" mobile apps that integrate with the social-networking site.
The U.S. Federal Trade Commission has hired an outside litigator to lead its antitrust investigation of Google, a possible sign that the FTC is preparing to file a lawsuit against the company.