Firefly
Freshtel is a new way of using your internet connection to call other people, both online and by phone or mobile phone.
http://www.freshtel.net/
Gnome-phone (alle)
Ekiga's home.
http://www.gnomemeeting.org/
K-phone
K-phone
http://www.wirlab.net/kphone/
SJ-phone
We produce the best softphones, webdialers and other sip/h.323 voip software for
service providers, pda and smartphone vendors and isvs.
http://www.sjlabs.com/
TK-phone (Linux)
TK-phone (Linux)
http://www.thekompany.com/products/tkphone/