[c_lib][network]The Libnet Packet Construction Library : Libnet is a high-level API (toolkit) allowing the application programmer to construct and inject network packets. It provides a portable and simplified interface for low-level network packet shaping, handling and injection. Libnet hides much of the tedium of
[c_lib][http]Libwww - the W3C Sample Code Library : Libwww is a highly modular, general-purpose client side Web API written in C for Unix and Windows (Win32).