Groundwork is a C++ class library for writing Web-based applications. Functional highlights include multi-part form handling, an IP-based security system, simple logging, runaway CGI catching, a load balancing system, hooks for embedded scripting using the language of your choice and more.
CGI++ is a full-featured and intuitive library for CGI programming in C++.Supports new HTTP/1.1 methods (PUT/TRACE/OPTIONS/DELETE) in addition to the old GET/HEAD/POST, and some extensions such as Netscape's cookies and file upload. Other features include Persistence, and a powerful interactive debugging mode.
cgic is an ANSI C-language library for the creation of CGI-based World Wide Web applications. cgic can be used free of charge, provided that a credit notice is provided online. Alternatively, a nonexclusive Commercial License can be purchased, which grants the right to use cgic without a public credit notice.