One of the leading ways Libraries communicates is on Twitter. We've rebuilt our timeline tool to comply with the new Twitter requirements, which includes an authentication tool (OAuth).
You can see the timeline in action on many of the Library pages, including the home page: library.gwu.edu.
The goal for this tool was to make it work with the new Twitter standards and make it easy to implement. We built it as a module (think 'plug in') for our content management system (Drupal). This makes it easy to integrate (you load the module and then check a box!) and easy to add to pages (one line of code).
This is just one tool in a long list that STG develops over the course of the year to support the needs of the Libraries' community.
The code is available on GitHub: https://github.com/gwu-libraries/Twitter-Timeline