Edit: The title should read “Other XULRunner Software”. Thanks
to Anonymous for pointing that out. Guess I was sleeping on that one. 
Just some additional information about other software based on XULRunner:
From Songbird’s website:
” Songbird is a Web player built from Firefox’s browser engine. Songbird is open source, will run on Windows, Mac OS X and Linux and supports user contributed, cross-platform extensions.
Songbird can do everything you’d expect a media player to do. Play music from your computer, as well as from the Web in one integrated user experience. If you run a music service, you can leverage Songbird’s APIs to create deeply integrated stores and user features.”
In short, a new open source media player application is out there on the cards, developed by Pioneers of the Inevitable LLC, a “small, chirpy team of digital media innovators”. After I downloaded, installed and used it, I realised that this application is extremely pre-alpha quality release; it would be good for anybody who wants to contribute to a potentially great product. And maybe a new “Edge” website too. There were plenty of bugs, crashes and quirkiness but also massive potential in this proof-of-concept application.
Additionally, a new Mozilla Composer (Nvu version 2?) based on XULRunner as well may possibly be released by Daniel Glazman in the future.
Total number of possible XULRunner-related applications in the future, as of mid-2006:
- Firefox - Internet browser
- Thunderbird - Email software
- Sunbird - Calendar
- Nvu - HTML editor
- Songbird - Media player
- Chatzilla - IRC client
- Other XULRunner applications
Do note that Nvu and Songbird are not officially related to the Mozilla Foundation.
Anonymous | 27-Aug-06 at 6:54 pm | Permalink
Please note that XPToolkit is the old (XPFE) toolkit and none of the listed applications use that anymore. http://developer.mozilla.org/en/docs/XULRunner_Hall_of_Fame lists various XULRunner applications.
David B. Haun | 27-Aug-06 at 8:04 pm | Permalink
Flock - Enhanced version of Firefox - Internet browser with additional Ablilities.
Kim Sullivan | 27-Aug-06 at 8:54 pm | Permalink
Another application that’s based upon the mozilla code is Celtx - http://celtx.com/ a tool for screenwriting and production. I’m not really sure if it qualifies as an XULRunner application (basically, it’s a “standalone extension” of Firefox, not really a completely new application), but it does build heavily upon the code.
Kwong Gary | 27-Aug-06 at 10:09 pm | Permalink
Flock would be listed as a “sub-set” of Firefox.
Daniel Glazman | 28-Aug-06 at 1:37 am | Permalink
Yes, Nvu2. XULrunner-based.
And it’s highly time to move from XULrunner to more understandable “Mozilla something” or “Firefox something” name….
Daniel Glazman | 28-Aug-06 at 1:37 am | Permalink
Wengo is already available as a xulrunner-based standalone app. See my blog.
Robert Strong | 28-Aug-06 at 9:02 am | Permalink
On Win32 Songbird is stable for me but I have heard about the instabilities on other platforms.
Alex Vincent | 28-Aug-06 at 2:31 pm | Permalink
Don’t forget Verbosio - http://verbosio.mozdev.org - this is intended as a XULRunner-based extensible XML editor.
Alex Bishop | 28-Aug-06 at 11:46 pm | Permalink
There’s also Internet TV thingy Democracy Player (go to http://www.getdemocracy.com/ for downloads and info). Like Songbird, it uses VLC for the actual media playing (though I understand Songbird plans to move away from exclusively relying on VLC).
Standard8 | 29-Aug-06 at 4:36 pm | Permalink
Don’t forget that SeaMonkey is also working towards being XULRunner based. Toolkit transition (http://wiki.mozilla.org/SeaMonkey:Toolkit_Transition) first, then XULRunner soon after hopefully.