Coccinella\'s whiteboard

Communicate with Coccinella

Coccinella is a free and open-source cross-platform communication tool with a built-in whiteboard for improved collaboration with other people.


User Nickname

I just checked in code for User Nickname which I think is a very important protocol extension and a missing part of XMPP. Never really understood the name attribute of the roster item since that is not set by that user.

Custom Builds

Now and then I get requests for custom builds of the Coccinella which is dead simple. But first a few words about how Tcl/Tk applications can be distributed.

Coccinella 0.96.0 Released

The Coccinella project is pleased to announce today the immediate availability of Coccinella 0.96.0, a free and open-source cross-platform chat client with a built-in whiteboard for improved collaboration with other people. This major version increase since 2004 confirms the refreshed state of the project since last month's establishment of the new Coccinella project website.

Ad-Hoc Commands

As a client developer, while implementing a XEP, I often encounter problems with missing or incomplete server support. I guess this is inevitable in a client-server environment with distributed development.


While polishing The Coccinella I noted one extra dialog when another user removed me from its roster by sending a 'remove'. This extra dialog was identical to the one when another user rejects a subscription from me. A bit of tracking pointed to a presence with type 'unsubscribed' which is sent by the server in both cases. So I went to the protocol definition, RFC 3921 where it says in section 2.2.1: "unsubscribed -- The subscription request has been denied or a previously-granted subscription has been cancelled."


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