Skype on the go with Skype for Pocket PC. Make voice calls and chat for free, no matter where you are. It's easy to use and available when you connect to WiFi or 3G
Skype - gives you free calls and instant messages to anyone else on Skype. It includes two great new features: SMS and file transfer. With 3.0 Beta, you can send text messages from your phone at Skype’s low rates, and send and receive files with your Skype contacts around the world – John Nguyen explains all in the video above
iSkootSymbian OS, Pocket PC, Palm, Series 60, UIQ, BlackBerry, SmartphoneVersion: beta Upload date: 1 Dec 08 Tags: Internet & Communications
Freeware
iSkoot for Skype delivers the rich features of Skype to your mobile phone! You can make & receive Skype calls, chat, and use SkypeOut to call regular numbers anywhere in the world. With our enhanced feature set, you can easily place SkypeOut calls to anyone in your general address book, and enjoy Skype chat features like emoticons and multi-party chat
Skype Gold
Skype is slowly making its mobile presence more relevant with the latest and full release of Skype for Windows Mobile devices called Skype v2.5, this is the Gold version, meaning the Beta tag has been lifted and it is in its full and greatest release yet. Making free phone calls to all your buddies with a Skype account has not been easier since....
Adore SIP Client - Adore Windows Mobile Softphone will strategically add the power of live voice communication to any Smartphone to Phone and Smartphone to Smartphone.
Adore Windows Mobile Softphone for SIP protocol allows ITSP to customize the application with their logo and user interface
Yeigo is a free and innovative application for your mobile phone, which uses your phones Internet connection, (don't worry, your phone has one) to offer you free calls, Instant Messaging and cut-price text messages
Talkonaut is free mobile calling, VoIP enabled, Google Talk like application for your mobile phone. Talkonaut supports Jabber, Google Talk, ICQ, MSN, AIM and Yahoo networks both for chatting and voice calling. Talkonaut allows to make free VoIP over GPRS/EDGE calls, as well as calls over 3G, or WIFI
Papaya - turns your phonebook into a fun and useful social network! It allows you to communicate with your friends cheaply and easily, no matter where you are. Using Papaya, you can play games with your friends, chat with them over IM, share pictures and other files, make cheap international calls, and more
VoipCall is a similar program like VoipSMS, instead this one if for calling someone.
Instructions:
In order to use VoipCall, it's important to configure it first.
Go to options and set the following values on the first tab (Application Settings). Pause sign: p (lowercase, this is default, however unlikely your phone might have a different sign)