Blink is the best real-time communications client using the SIP protocol.
You can use it with many SIP providers, on the LAN using Bonjour and with SIP2SIP, a free service.


Elegant, simple to use and feature-full


Available for Windows and Linux and on the Mac App Store for OSX

appstore

Get the addressbook plugin for OSX


Soon available for Mobile devices

Features

Voice and Video

  • Studio Audio Quality (Opus codec)
  • HD Video (H.264 codec)
  • Acoustic Echo Cancellation
  • End-to-end Encryption (ZRTP)

IM & Presence

  • Chat Sessions (MSRP)
  • End-to-end Encryption (OTR)
  • Presence (SIMPLE)
  • Server Storage (XCAP)

File Transfers

  • File Sessions (MSRP)
  • Encryption (TLS)
  • Progress Reports
  • Delivery Confirmation

Screen Sharing

  • Help Family Remotely
  • Collaboration at Work
  • Surf Internet Together
  • Integrated with Audio

Conferencing

  • Manage Participants
  • VoIP, IM and Presence
  • File Transfers
  • Screen Sharing