eyeBeam for Windows - description from Softdepia.com:
CounterPath's eyeBeam 1.5 a multimedia communicator designed to enhance the user's communications experience in Voice over IP. Whether you are a consumer or Small Office/Home Office (SOHO) user, eyeBeam allows you to stay connected and manage your calls and availability with a comprehensive suite of carrier-grade Voice, Video, IM and Presence features.
Based on open standards, eyeBeam 1.5 uses a dialpad-centric interface to allow users to manage their voice, video, IM and presence applications on their desktop solution. With this intuitive and familiar interface, users can seamlessly transition from a traditional hard phone environment into the world of Voice over IP. Also by making the navigation simple and user friendly, eyeBeam provides its growing community of users with easy access to video and contact management.
Whether you are having a simple voice conversation or hosting a conference call with multiple collaborative applications, eyeBeam offers users the ability to personalize your softphone and manage your availability.
eyeBeam for Windows is a "Free to try" program. You can download and try it for an evaluation period.