SuperToast Professional is available for $0 through the Vanderbilt Software Store.
Microsoft Lync 2010 users can use SuperToast to send alerts for the instant messages (IMs) they miss. In addition, you can use SuperToast to display a list of all missed conversations and to re-engage in a specific conversation.
Vanderbilt's site license lets employees and students install SuperToast on their home computers; departments can install on enterprise machines.
Modality Systems, the manufacturer, expects to release a Lync 2013 compatible version by the end of the year.