SIP Websites

Provides SIP client software, server software, and software development kits.

Provides SIP softphone, web-to-phone, and click-to-call software.

Provides SIP products and applications for service providers and enterprise networks.

Offers SIP softphone freeware for Windows. English and German instructions.

Provides a SIP softphone with switchboard for receptionists.

Provides a software development kit for adding SIP calling features to applications.

Provides SIP video communications for desktop (Windows, Linux) and mobile (Windows Mobile and Android) platforms.

Softphone for Android, Blackberry, iPhone and Windows PC.

A softphone client for Windows.

A SIP (Based on RFC 3261) Interactive Voice System (IVR) running under Windows.

A mobile software development company with a focus on SIP clients for mobile devices.