Advanced VoIP
Advanced VoIP is a suite of applications providing complete solutions of billing toVoIP Providers and Internet Service Providers. Most of the Internet Telephony Service Providers / Voice Over IP/LDI and Local loop operators consider their job done once their network is setup and their customers start making calls but it is only then that the real differentiation begins and in most cases the Billing Solution becomes the real differentiator.
http://advancedvoip.com/

Rodopi VoIP Software
Rodopi OSS provides a fully web-enabled suite of software to automate customer subscription and activation, real-time provisioning, billing and customer care for ISPs, ASPs, web hosts and VoIP providers.
rodopi.com/

sip soft phone,pc to phone software,sip dialer and windows sip client - Adore Softphone
Adoresoft offers SIP Softphone for Internet Telephony Service Provider.
adoresoftphone.com

voip billing,telecom billing,billing radius software and Softphone - Adore Infotech
Adore offers scalable online VOIP billig,ip softphone,radius server and voip softswitch solution supporting prepaid,postpaid,wholesale and termination service
adoreinfotech.com