GnuTLS

libimobiledevicelibimobiledevice/libimobiledevice

A cross-platform library implementing native protocols to communicate with iOS devices without proprietary dependencies.

libhvithewei/libhv

A cross-platform, high-performance C/C++ network library with simpler APIs for TCP/UDP/SSL/HTTP/WebSocket/MQTT client/server development.

libwebsocketswarmcat/libwebsockets

A lightweight, secure, pure C library for building scalable client and server applications with HTTP/1, HTTP/2, WebSockets, and MQTT.

QPDFqpdf/qpdf

A command-line tool and C++ library for content-preserving PDF transformations like linearization, encryption, splitting, and merging.

libdatachannelpaullouisageneau/libdatachannel

A lightweight C/C++ WebRTC library implementing Data Channels, Media Transport, and WebSockets for cross-platform peer-to-peer applications.

Oniondavidmoreno/onion

A C library for creating simple HTTP servers and web applications, designed to embed web functionality into existing programs.