VaxVoIP SIP Android SDK provides tools and components to quickly add SIP (Session Initiation Protocol) based softphone and SIP client for Android based devices and other Hand-Held device.
OfficeSIP Softphone is an audio / video softphone for Windows primarily for use in business scenarios, offering you an efficient and easy way of communication for free.
VaxVoIP SIP iOS SDK provides tools and components to quickly add SIP (Session Initiation Protocol) based softphone and SIP client for Apple iOS based devices (iPhone, iPad, iPod etc.) and other Hand-Held device.
Enigma is a free Session Initiation Protocol (SIP) softphone available for your download. It can used to make Internet calls, establish conference and send instant messages to your buddies under the same SIP network. Choose your platform see features
Video VoIP SIP SDK for iPhone is a solution to quickly build VoIP softphone that can dial and receive calls on your computer or add VoIP features into your software.
ABTO Software's VoIP SIP SDK allows quick VoIP softphone app development. SIP softphone provides voice, video and IM communication, supports VPN and SRTP connection, and is compatible with most SIP servers.
VaxVoIP SIP Desktop SDK provides tools and components to quickly add SIP (Session Initiation Protocol) based webphone, softphone and IVR systems for Desktop OS and Mobile-Phones.
Express Talk is software that works like a telephone to let you make calls from your PC. With Express Talk you can call anyone on the internet who has installed Express Talk (or any other SIP voip softphone). Calls are free.