Blink is a state of the art, easy to use multimedia SIP client. It is elegant, intuitive to use and feature-full.

Blink can be used without an account on the LAN, or can be configured to use SIP accounts from any service provider. Free account sign-up to SIP2SIP free service is also provided in case you don't have a SIP account.

• OSX Integration (iCloud, iTunes, Address Book, Keychain, Voice Over)
  
• Audio (Opus codec) optimised for full spectrum audio
  
• Video (H.264 codec) supporting HD 720 @30fps
  
• Acoustic echo cancelation, no headsets needed
  
• Presence (SIP SIMPLE RLS and XCAP protocols)
  
• Instant Messaging and File Transfers (MSRP protocol)
  
• Screen Sharing (Apple VNC over MSRP protocol)
  
• Multiparty conferencing (audio, chat and file transfers)
  
• End-to-end chat encryption (OTR protocol)
  
• End-to-end audio and video encryption (ZRTP protocol)
  
• Corporate directory services (LDAP protocol)
  
• Compatible with telephony applications (dialpad, call hold, call transfer)
  
• Fine-grained settings for SIP experts
  

Version 4.5.1

• Fix Presence and XCAP contacts on OSX 10.12