1)   TAPICall 1.2
TAPICall turns your desktop PC into a highly efficient CTI work station by means of Outlook add-in, Popup of your contacts by Phone number, Journal entry, Operates with any up-to-date PBX or ISDN controller, Nontutorial handling,

 2)   PbxTools PhoneJournal 1.4.2
PbxTools PhoneJournal is a call accounting software designed for small and medium offices that can help reducing the phone bill and give real-time information about outgoing and incoming calls inside the company.

 3)   3CX Phone System for Windows Free 6.0
3CX VOIP Phone System FREE edition is a SIP-based IP PBX developed for Windows. Easy to install and configure, it eliminates phone wiring and allows hot desking. Lowers call costs via VOIP providers & eliminates vendor lockin. Download FREE edition!