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 new version fixes several important bugs. Attended transfer is the main new feature. One can now drag and drop two calls on each other and select between transferring the call or creating a conference call.