Jabberpresence is a Thunderbird extension that has the purpose to verify the presence (online status) of your Jabber contacts.
Users can add their Jabber accounts (Tools->Jabber Account Setting). A new panel is added in the bottom-left corner, listing contacts presence status.
Also, users can send and receive instant messages.
(Please note that this feature doesn't work on 1.5.* versions due to a bug of Jabberzilla. See the release notes for further details)
Authors of "Jabberpresence":
· Fabio Calefato,
· Stefania Fantasia,
· Raffaele Cannone
· Thunderbird 0.9 - 1.5.0.* ALL