6 links
CT Messenger TAPI ActiveX Components
ivrsoft.com
Produces TAPI compliant scriptable COM objects to quickly embed over-the-phone notification, text paging or SMS into applications.
Sipient Systems
sipient.com
Provides tools for capturing and then displaying SIP traffic in a graphical format.
VOIP Jitter Analysis and Mitigation
freewebs.com
A tool to characterize one-way jitter experienced by VOIP calls made over the Internet.