NotifierLight is a Windows application that supports multiple types of notification lights and notification sources, including TAPI & OBDC. It's been in development since 2012, is open-source, and has a nice plugin architecture for new notification sources.
As of a month ago, NotifierLight now supports blink(1)!
If you are a .NET aficionado, you can write your own plugins pretty quickly.
The creator of NotifierLight also made these great door hanger or desk displays to let your co-workers know what the colors mean.