IP-PBX - Apps Rating

Microsoft Lync (formerly Microsoft Office Communicator) and Microsoft Lync for Mac are instant messaging clients used with Microsoft Lync Server or Lync Online available with Microsoft Office 365. Basic features include instant messaging, Voice Over IP and Video Conferencing inside the client software.

IBM Sametime is a client–server application and middleware platform that provides real-time, unified communications and collaboration for enterprises. Those capabilities include presence information, enterprise instant messaging, web conferencing, community collaboration, and telephony capabilities and integration.

With Cisco Unified Communications, your company can connect co-workers, partners, vendors, and customers with the information and expertise they need, access and share video on the desktop, on the road, and on-demand, as easily as making a phone call, facilitate better team interactions, dynamically bringing together individuals, virtual workgroups, and teams, make mobile devices extensions of the corporate network so mobile workers can be productive anywhere

Virtual PBX Service For Any Business, provides virtual office connectivity, user friendly Web 2.0 management, free extension to extension calls, free internet to internet calls

Kerio Operator is a small business phone system. Using VoIP, it simplifies voice communications while offering advanced phone features typically associated with enterprise phone systems like conference calls, call forwarding, call recording, ring groups, office voicemail to email, auto attendant, and call queues.