Here are some alternatives to Skype
Gizmo5 is is a Free Phone For Your Computer that makes calling as easy as instant messaging
JAJAH is free and low-cost global calling with your regular phone. There is no headset, no download, no software and no broadband connection needed. You are using your existing phone (landline or mobile) and so is the person you are calling. You simply provide your own number and the number you want to call and JAJAH will connect your call between two regular phones anywhere in the world – no monthly fee, no registration fee.
PhonerLite is a clearly arranged application for Windows. PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP ). Pre-conditions are a full-duplex sound card , a microphone andspeakers (alternativelya headset), an internet connection and a registration at a provider supporting the protocol SIP .PhonerLite supports several SIP profiles, each configurable independently. In thesame way the integrated phone book and call log are easy to use.
If you are already a VoIP or Broadband service subscriber (i.e. you receive VoIP service from your local Service Provider or local IP-PBX), X-Lite lets you make audio calls to any softphone, mobile or landline number, and make video calls and send IMs to any softphone which supports these functions.
Raketu is where COMMUNICATIONS meets media and people networks in one application. You can make 8 different types of calls – free or the cheapest calls anywhere. Raketu services are available from Raketu program or directly from Raketu’s website RakWeb-no downloads. The Raketu program and RakWeb are fully synchronized. Access Raketu via:any Mobile, Desktop, Download, Web site, widgets, SMS-Texting, SIP device, Roaming data, Dialup, WiFi or Broadband.