They are all really meant for the iPhone, but w/ the Wifi available on the iTouch they work perfectly for the iTouch (though you don't have some of the features working)
The list:
http://www.truphone.com/
http://www.icall.com/
http://www.fring.com/ <----This one was mentioned before on these forums
http://mobile.phonegnome.com/iphone/ <----- Link works on the iPod only but you have to register (click on it to redirection)
http://iphone.jajah.com/iphone/ (Always expect them to come through...)
AND MY FAVORITE if you have Vonage you can use this to make free calls from your iTouch to all of Europe and North America and intl. calls very cheap...
And the link for this is: http://rf.com/
Let me know how these works, I haven't tried all of these
Source: http://www.voip-sol.com/iphone-voip-apps-the-top-softphones-for-iphone/ (There are plenty more links for apps on here)
The list:
http://www.truphone.com/
http://www.icall.com/
http://www.fring.com/ <----This one was mentioned before on these forums
http://mobile.phonegnome.com/iphone/ <----- Link works on the iPod only but you have to register (click on it to redirection)
http://iphone.jajah.com/iphone/ (Always expect them to come through...)
AND MY FAVORITE if you have Vonage you can use this to make free calls from your iTouch to all of Europe and North America and intl. calls very cheap...
And the link for this is: http://rf.com/
Let me know how these works, I haven't tried all of these
Source: http://www.voip-sol.com/iphone-voip-apps-the-top-softphones-for-iphone/ (There are plenty more links for apps on here)