[http://www.gizmoproject.com/ Gizmo] is a Free Phone for Your Computer, very similar to Skype but it's using the SIP protocol.

Be aware that the linux version is still in alpha stage!

Download

Download the latest version and the additional two packages from their [http://www.gizmoproject.com/download.php webpage]

wget -c http://www.gizmoproject.com/download/bonjour_107.1-0.0.0.50.linspire0.2_i386.deb
wget -c http://www.gizmoproject.com/download/libsipphoneapi_0.78.20050817.1-1_i386.deb
wget -c http://www.gizmoproject.com/download/gizmo_0.8.0.6-1_i386.deb

version number could be different in the meantime!

Installation

Just install the 3 downloded packages:

sudo dpkg -i bonjour_107.1-0.0.0.50.linspire0.2_i386.deb
sudo dpkg -i libsipphoneapi_0.78.20050817.1-1_i386.deb
sudo dpkg -i gizmo_0.8.0.6-1_i386.deb

Start it with the following command in your shell:

gizmo

Troublehshooting

[http://forum.gizmoproject.com/ Gizmo Forum]