LYNC SOCIAL (Beta) is the first FREE application for Microsoft Lync that allows users to update your Lync, Twitter and LinkedIn statuses simultaneously. LyncSocial is a simple way to enhance your social media presence without taking the extra time to login and post to different platforms. Simply include #TW for Twitter or #LI for LinkedIn in your Lync status to automatically update these platforms.
http://www.lync-social.com/
http://www.mindlinksoft.com/
Profiles For Lync - bounce between user accounts or systems with a single click!
http://gallery.technet.microsoft.com/office/Profiles-For-Lync-multiple-bef8769f
Script to show Lync connections, and the users connected. This was quite informative as it could be used to show load balance distribution, client versions being used, and more.
http://www.ehloworld.com/269
Bulk IM App for Lync - http://www.bluequalitystudios.com.au/s01/products/psimalerts