yorik

This plugin allows to place widgets on your sidebars, that fetch the contents of one or more RSS feeds, combine them by date if there is more than one, and display their contents in a twitter-like manner, that is, a list of texts, where links, @someone and #something are turned into links.
Use it typically to condense several twitter feeds into one, or to display any other feed that follows twitter syntax, such as identi.ca

Twitter List Widget

This plugin allows to place widgets on your sidebars, that fetch the contents of one or more RSS feeds, combine them by date if there is more than one …

lucha

A simple interface to a jQuery plug-in, originally written by heisde.de and thereafter re-written by the author.
The plugins offers the possibility of showing in posts (and optionally pages) buttons for sharing content to Facebook, Google Plus, Twitter, and Identi.ca. These buttons are dummy-button by default, and only after explicit action by the visitor they are activated and become the real buttons. This allows to give control to the single visitor if he wants to send 
sensible personal information to third-parties sites, and thus providing a nice compromise between privacy and social sharing.

Privacy Share Buttons

Enables the well-known "Share this" buttons for different social networks, but with respect toward's your user privacy and data.

Twitter List Widget vs Privacy Share Buttons