At Web 2.0 Expo, the emphasis is on social networking tools. aggregates more than 100 social networks into one place and you can control who sees which network. Tweetcall lets you send Twitter messages over your phone by voice. Senior Editor Robert Strohmeyer fills you in on those two and some other new apps on display on the conference in San Francisco.

To comment on this article and other PCWorld content, visit our Facebook page or our Twitter feed.
Shop Tech Products at Amazon