Open-source alternatives to Tlse

Beast is a C++ library for implementing low-level HTTP and WebSocket clients and servers. It functions as an asynchronous networking framework designed to compose non-blocking I/O operations and layered stream stacks for managing concurrent network traffic, specifically utilizing the Boost.Asio asynchronous model. The library provides a comprehensive implementation of the HTTP/1.1 and WebSocket protocols. For HTTP, it includes primitives for parsing and serializing messages with support for chunked transfer encoding, incremental body reading, and request pipelining. Its WebSocket implementati

A C library for asynchronous DNS requests

Mongoose is an embedded networking library providing TCP/IP stacks, web server hosting, and IoT device connectivity. It enables microcontrollers and desktop systems to implement network protocols including HTTP, WebSocket, and MQTT. The project provides a bare-metal TCP/IP stack for environments without a native operating system and includes built-in TLS and ECC encryption to secure network traffic. It features a binary-embedded file system to serve web content directly from the executable and supports over-the-air firmware updates for managing device fleets. Additional capabilities cover as

Corvusoft's Restbed framework brings asynchronous RESTful functionality to C++ applications.

C++ library for creating an embedded Rest HTTP server (and more)

foursquare iOS networking library

gopacket is a Go library for live packet capture and multi-layer protocol decoding. It provides a framework for parsing raw network bytes into structured protocol layers, enabling inspection and analysis of network traffic directly from interfaces or packet capture files. The library distinguishes itself through a layered protocol stack that organizes decoders as independent, composable layers, and an interface-based decoder registry that supports extensible custom protocol development. It offers zero-copy packet decoding for high-throughput parsing, stream-based TCP reassembly to reconstruct

WHATWG-compliant and fast URL parser written in modern C++, part of Internet Archive, Node.js, Clickhouse, Redpanda, Kong, Telegram, Adguard, Datadog and Cloudflare Workers.

Boost.org asio module

A simple wrapper around libpcap for the Go programming language

Alamofire is an HTTP networking library that provides a foundation for managing network requests and responses through a chainable, type-safe interface. It serves as an asynchronous request manager, coordinating concurrent network operations and data streams while maintaining application responsiveness. The library distinguishes itself through a protocol-oriented request adaptation system, which utilizes interceptors to modify or authenticate requests before dispatch. It employs a middleware-driven pipeline to process traffic, handling encoding, authentication, and error recovery in a modular

Ultra fast and low latency asynchronous socket server & client C# .NET Core library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution

C++ client for making FTP requests

Reachability.swift is a network connectivity listener and Swift network state wrapper. It monitors real-time changes to network status and tracks whether a device is connected to Wi-Fi or cellular data. The library functions as a network reachability monitor that uses closures and system notifications to trigger callbacks when connectivity changes. It tracks internet connectivity and connection types to allow for network state handling and the adjustment of app content loading based on availability.

go websocket, a better way to buid your IM server

Fortio is a performance testing tool written in Go that generates constant request rates to measure latency histograms and response percentiles. It functions as a network performance benchmarker for analyzing system performance across HTTP and gRPC endpoints, and includes a specialized HTTP echo server for mirroring requests. The project distinguishes itself through a web-based HTTP load testing API used for triggering asynchronous tests and visualizing result data through graphs. It also provides server behavior simulation, allowing the echo server to inject artificial delays and vary respon

httplab is an interactive HTTP mock server, request inspection tool, and response simulator. It functions as a web server designed to capture and analyze incoming HTTP requests and headers in real time for debugging purposes. The tool enables the construction and delivery of custom HTTP responses to simulate various server behaviors. Users can forge specific headers and bodies to test how client applications handle different status codes and payloads, with the ability to save these configurations as response templates for consistent reuse across sessions. The project covers a broad surface o

This project is a Go library and framework for implementing the SSH protocol. It provides a toolkit for building custom SSH servers, managing encrypted connections, and handling remote command execution. The implementation focuses on flexible session management through callback-based handling and a pluggable authentication system that supports passwords, public keys, and certificates. It includes mechanisms for secure network tunneling, including local and reverse port forwarding for TCP and Unix domain socket traffic. The library covers a broad range of protocol capabilities, including cryp

Simple mDNS client/server library in Golang