libvfcgi is a library that implements FastCGI for GObject and Vala applications, written in Vala. It aims to fully implement the FastCGI specification and make FastCGI Web application servers accessible to Vala programmers and GObject C programmers. Note that while it is possible to use the library from GObject C, it is designed for use with Vala and may be tedious to use directly in C.
NNCMS (NoName Content Managment System) is a simple content management system written in pure C. It requires a Web server with FastCGI support. It is meant to allow control of the content of Web sites using a Web interface. It can generate image thumbnails, and you can browse, edit, remove, and add files.
Coq au Vin is a blogging engine written in Chicken Scheme. It is designed to appeal to users who have basic Web development skills (i.e., who know HTML and CSS), are able to install their own server-side software, and would rather edit a template than press 105 buttons to customize their sites.