There is GWan (<a href="http://gwan.com/" rel="nofollow">http://gwan.com/</a>) but it is not open source.<p>If you are OK with C++, there is Wt (<a href="http://www.webtoolkit.eu/wt" rel="nofollow">http://www.webtoolkit.eu/wt</a>).
Probably not, and you will be doing so many string manipulations that it might not be worth trying. There are a few libraries for getting CGI parameters, but that's all I'm aware of.<p>If your reason for wanting to code in C is for performance at a popular site, cacheing and server configuration will probably be the most important factor.