Blink Pro

Blink is an easy to use multimedia SIP client.
* OSX Integration (iCloud, iTunes, Address Book, Keychain, Voice Over)
* Clear audio using Opus codec optimised for full spectrum audio
* Telephony compatible codecs
* Video calls
* Acoustic echo cancelation
* Presence (SIP SIMPLE RLS and XCAP protocols)
* Chat and File Transfers sessions (MSRP protocol)
* Instant Messaging (SIP Message)
* Screen Sharing (VNC protocol)
* Multiparty conferencing (audio, chat and file transfers)
* End-to-end chat encryption (OTR protocol)
* End-to-end audio encryption (ZRTP protocol)
* Corporate directory services (LDAP protocol)
* OpenPGP support for SIP messaging
* Compatible with telephony applications (dialpad, call hold, call transfer)
* Fine-grained settings for SIP experts
Blink does not collect any data. Contacts accessed by Blink from system address-book are not uploaded to any servers.