Blink SIP Server and client

http://icanblink.com/blink-pro.phtml

Quote:

Multiparty Conferencing Demo movie Blink can conference audio only calls locally, without the need for a server. For more media types and advanced conferencing features, a proper SIP conference server with 'isfocus' support is required. Blink supports the client side of the following conferencing features: Wideband Audio (G722 codec) Conference Information (conference-info event package) Add/remove Participants (out-of-dialog REFER method) Instant Messaging (MSRP chatroom support) File Transfers (MSRP file transfer support) Screen Sharing (private SylkServer extension)

I don't know about the 'resale' aspect and licensing ...