SFLphone is an SIP/IAX2 compatible softphone. The goal is to create a robust enterprise-class desktop phone. While it can serve home users very well, it is designed for intensive corporate use.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release has few changes but some fairly important bugfixes. It fixes history logic and the instant messaging user interface. It improves the SIP core by adding a keep-alive for account registration and updating the Contact header from 200 OK.