Blink, a state of the art, easy to use SIP client.
You can use it with any SIP provider or its own fully-featured SIP service.
Voice over IP
* HD Audio (G722/Speex)
* PSTN Compatible (G711)
* Encryption (sRTP)
* NAT Traversal (ICE)
* Multi-Party Conferencing
Instant Messaging
* Chat Sessions (MSRP)
* SMS (SIP MESSAGE)
* Encryption (TLS)
* Rich-Text, Emoticons
* Composing Indication
Presence
* Presence (SIMPLE)
* RLS Services
* Offline Status
* Server-side Storage (XCAP)
* Buddylist Syncronization More Info »
File Transfers
* Exchange Files (MSRP)
* Encryption (TLS)
* Drag and Drop Photos
* Works behind NAT
* Retry Transfers
Desktop Sharing
* Help Family Remotely
* Collaboration at Work
* Surf Internet Together
* Integrated with Audio
* Works behind NAT
Blink Pro Features
* OSX Integration (iCloud sync, iTunes, Address Book, Keychain, Voice Over)
* Video Calls
* End-to-end audio and video encryption (ZRTP)
* History menu for outgoing and incoming calls
* History browser
* System Address Book external plugin (can dial with Blink from Address Book)
* Answering machine
* Call transfer and call recording
* LDAP directory search
* Launch external application on incoming calls
* Phone number translations
