Skype is software for calling other people on their computers or phones. Download Skype and start calling for free all over the world. The calls have excellent sound quality and are highly secure with end-to-end encryption. You don't even need to
Free VOIP / SIP phone (softphone). Use your PC as a phone. Works with any SIP / VOIP provider and phone service. Easy to use interface to transfer, forward calls or review history of calls. Free download from http://www.3cx.com
DVD to AVI Window Mobile Sound Recorder is an easy-to-use application which could auto record sound and phone calls on Windows Mobile. It also could play the record file so that you could check if you record successfully.
this software allow you to get the list of calls and phonebook and the received and stored SMSs from your mobile and send SMSs to your contacts. you can save the phonebook and the SMSs in excel or csv or html file or export to outlook as Vcard file.
FoneWatch automatically records all incoming and outgoing phone calls made on your mobile device. All recordings are stored to a database, which can later be searched. Stored phone calls can be played back, paused, resumed, and stopped.
Plex Recorder is a free to try tool that works in conjunction with Skype for recording calls. Works in automatic/manual mode, automatically compresses recordings to MP3/WMA, has user-friendly interface
Asterisk Phone Agent (APA) is a Computer Telephony Integration (CTI) application that integrates with your Asterisk PBX and allows you to perform various telephone operations from your PC.