Asio is a cross-platform C++ library for network and low-level I/O programming that provides developers with a consistent asynchronous model using a modern C++ approach.


Asio C++ Library

Open vSwitch is well suited to function as a virtual switch in VM environments. In addition to exposing standard control and visibility interfaces to the virtual networking layer, it was designed to support distribution across multiple physical servers. Open vSwitch supports multiple Linux-based virtualization technologies including Xen/XenServer, KVM, and VirtualBox.

Open vSwitch - Multilayer Virtual Switch

Orchid is a Tor client implementation and library written in pure Java. Orchid will open a SOCKS5 listener which can be used as a standalone client where Tor would otherwise be used. It can also be used as a library by any application running on the JVM. 

Orchid - Tor client implementation and library written in pure Java

ZMap is an open-source network scanner that enables researchers to easily perform Internet-wide network studies. With a single machine and a well provisioned network uplink, ZMap is capable of performing a complete scan of the IPv4 address space in under 45 minutes, approaching the theoretical limit of gigabit Ethernet. ZMap can be used to study protocol adoption over time, monitor service availability, and help us better understand large systems distributed across the Internet.

Zmap - The Internet Scanner

Modern, powerful open source C++ class libraries and frameworks for building network- and internet-based applications that run on desktop, server, mobile and embedded systems. It has a collection of C++ class libraries, conceptually similar to the Java Class Library, the .NET Framework or Apple’s Cocoa. 

POCO C++ Libraries - Cross-platform C++ libraries with a network/internet focus

The project aims to build upon the latest C++ standard (currently C++11) to provide easy to use libraries for network programming. We use the latest compiler versions and features with an eye on pushing the boundaries on leveraging what's available in C++. Currently the library contains an HTTP client and server implementation, a stand-alone URI library, a network message framework, and some concurrency tools.

cpp-netlib - The C++ Network Library Project

LibreNMS is an autodiscovering PHP/MySQL/SNMP based network monitoring which includes support for a wide range of network hardware and operating systems including Cisco, Linux, FreeBSD, Juniper, Brocade, Foundry, HP and many more.
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Its features include: 
<ul>
<li>Automatically discover your entire network using CDP, FDP, LLDP, OSPF, BGP, SNMP and ARP. </li>
<li>Highly flexible alerting system, notify via email, irc, slack and more. </li>
<li>A full API to manage, graph and retrieve data from your install. </li>
<li>Generate bandwidth bills for ports on your network based on usage or transfer. </li>
<li>Stay upto date automatically with bug fixes, new features and more.</li>
<li>Horizontal scaling to grow with your network.</li>
</ul>

LibreNMS is an autodiscovering PHP/MySQL/SNMP based network monitoring which includes support for a wide range of network hardware and operating systems including Cisco, Linux, FreeBSD, Juniper, Brocade, Foundry, HP and many more.

LibreNMS - Network monitoring system

Flannel runs a small, single binary agent called flanneld on each host, and is responsible for allocating a subnet lease to each host out of a larger, preconfigured address space. Flannel uses either the Kubernetes API or etcd directly to store the network configuration, the allocated subnets, and any auxiliary data (such as the host's public IP). Packets are forwarded using one of several backend mechanisms including VXLAN and various cloud integrations.

flannel - Network fabric for containers, designed for Kubernetes

Transport Layer Security (TLS) is a cryptographic protocol designed to provide communication security over the Internet. This is an open source Python implementation of TLS 1.2, using the Python Cryptographic Authority's (PyCA's) Cryptography libraries for all cryptographic primitives (e.g. AES, RSA, etc.). This project is part of PyCA's efforts to standardize and improve crypto libraries in Python.

TLS - Transport Layer Security protocol implementation in Python

Educate and Empower software professionals in open source tools and technologies.

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