If you want to execute JavaScript from C++ to Internet Explorer, please read this interesting link. It could be very usefull if you want to do any javascript extension. Te source code sample is for Visual C++. And you must to do it with Active X.
The software to deploy blogs, similar to wordpress is now Open Source, that means that you can download the source code as you want. This decission is very important, I think to get a solid plattform where developers can find bug or add it's own improvements. You can download the source code from here.
If you want to extend the DOM for JavaScript and use it with any browser, you can use the JNEXT Framework, an Open Source project that allow us to develop our own extension. For example if you want to use your librarythrough JS you only need to develop the wrapper following the JNEXT instructions. The architecture is very easy and with a little c++ knowledge you can do it. you can download the entire source code from the next link
As you know Mac Os X is based on a Free BSD, the distributtion is called Darwin. The Darwin version of Leopard is Darwin 9, You can donwload and isntall it from the next link: Darwin's Versions
The User Interface of Mac Os X is private, but if you want to view the core code you can do it downloading the source code.
Also there are a lo of Open Source by Apple, like the Video Streaming Server, Bonjour technology and more. Apple Open Source
The Vodafone Mobile Script v2.0 is now avaliable to download. You can download the code or the binaries at the next link : Mobile Script Forge . To view a example of this utilitie view the next link : Mobile Script Video
Daniel Perella has developed an interesting code to redirect networks ports via software. The source code is avaliable on the google groups. Follow the next link: SourceCode. Also if you want to take part of this google groups please send me a mail at pedro.fraca@gmail.com