TringMe is the first to build a native application for BlackBerry. TringMe is a complete VoIP service suite that allows free in-network calling over Wi-Fi and 3G, and cheap calls to other phone networks worldwide. One thing special with TringMe is that it provides a complete package of application development tools for users and enterprises to develop their own VoIP applications.
Truphone VoIP service for BlackBerry is very good in at least two ways: the local and international rates are among the cheapest, starting at 6 cents for common destinations (calls between Truphone users are free); and secondly even if you have no data plan or Wi-Fi connection, you can still make VoIP calls with the service.
Mo-Call is a VoIP service that works on more than 2000 mobile devices, including BlackBerry handsets. Besides offering free calls within its network over Wi-Fi and 3G, Mo-Call allows you to make VoIP calls over your BlackBerry even without Internet connection - a simple GSM signal suffices.
Vopium is a mobile VoIP service that offers cheap international calls through GSM and VoIP, without necessarily having a data plan (GPRS, 3G etc.) or Wi-Fi connection. If you do have any of the latter, you can make free calls to other users using the same networks.
- Raketu's BlackBerry VoIP service
This Raketu service allows BlackBerry users to make cheap international calls, as well as sending email and text messages using the same browser-based application from Raketu. There is no need to download any software. Just load the application on your browser and use it.
Voxofon is one of the many phone services that offer the possibility of making international calls using mobile phones for very cheap, compared to the high rates of pure GSM and other traditional services. Calls can be initiated using GSM network and the rest is handed over to VoIP.
- Vonage Mobile
Vonage Mobile can make you save a lot of money and provide you convenience in communication if you live in the US, you use an iPhone, iPod or a BlackBerry machine, and better still if you are already a Vonage customer.
Vonage Mobile review
- Google Voice
The new Google Voice mobile application allows you to make calls and send SMS messages with your Google Voice number directly using your mobile phone. The phone's contacts are fully integrated with the application so your phone's address book can be used. The application also allows access to your voicemail, for reading transcripts, access call history etc., and place international calls at low rates.Download the application from there.
Google Voice review
This company provides a SIP-based VoIP client for BlackBerry machines. It also provides an SDK for the development of VoIP applications for BlackBerry.
fg microtec VoIP Client review
Agito Networks offers Enterprise VoIP for BlackBerry smartphones to be used in SMBs.
- EQO Mobile
EQO Communications is a developer of mobile applications for VoIP, and it's new application for Skype, EQO Mobile can transform your BlackBerry into a cheap or free calling device. EQO is compatible with all major IM services: MSN, AIM, Yahoo!, Google Talk, QQ, ICQ and Jabber.
- WebMessenger Mobile For Skype
This is a free downloadable application that allows you to take Skype along with you on your BlackBerry, along with all its all its features, including the ability to make free and cheap calls. A cheap paid version of the application comes with some added features.
You can have an idea of different prices of BlackBerry models from different stores here.