If you're using Twitter's Search API via the api.twitter.com sub-domain, you have a week to switch to search.twitter.com, according to a post from Twitter's Taylor Singletary. The endpoint being removed has not been officially supported by Twitter, though other supported calls use the same sub-domain.
The Votizen API aims to get friends to involve their friends in supporting candidates. The API website notes that the API is entirely based on HTTP. Votizen is based on the premise that, "Voters are more likely to listen to friends than campaign volunteers." Votizen is the first "social campaigning platform built entirely on personal connections."
Last week Facebook rolled out several platform updates pertaining to Authentication, Social Plugins and the Graph API. Several key features were added to the platform; introduction of a new access token API endpoint, the launch of the Shared Activity Plugin and real-time update settings were added to the App Dashboard.