PacketSender - Network utility for sending / receiving TCP, UDP, SSL

•    C++

Packet Sender is an open source utility to allow sending and receiving TCP, UDP, and SSL (encrypted TCP) packets. The mainline branch officially supports Windows, Mac, and Desktop Linux (with Qt). Other places may recompile and redistribute Packet Sender. Packet Sender is free and licensed GPL v2 or later. It can be used for both commercial and personal use. Official releases of Packet Sender can be downloaded at PacketSender.com. Some places redistribute Packet Sender.

chihaya - A customizable, multi-protocol BitTorrent Tracker

•    Go

Note: The master branch may be in an unstable or even broken state during development. Please use releases instead of the master branch in order to get stable binaries. Chihaya is an open source BitTorrent tracker written in Go.

3proxy - 3proxy - tiny free proxy server

•    C

3proxy - tiny free proxy server

nsupdate.info - Dynamic DNS service

•    Python

https://nsupdate.info is a free dynamic DNS service. nsupdate.info is also the name of the software used to implement it. If you like, you can use it to host the service on your own server.

netaddr - A network address manipulation library for Python

•    Python

A network address manipulation library for Python

thc-ipv6 - IPv6 attack toolkit

•    C

IPv6 attack toolkit

IP Calculator

A simple and easy to use IPv4 and IPv6 subnet calculator.

public-ip - Get your public IP address - very fast!

•    Javascript

In Node.js, it queries the DNS records of OpenDNS which has an entry with your IP address.In browsers, it uses the excellent icanhaz service through HTTPS.

vflow - Enterprise Network Flow Collector (IPFIX, sFlow, Netflow)

•    Go

High-performance, scalable and reliable IPFIX, sFlow and Netflow collector (written in pure Golang).You can download and install pre-built debian package as below (RPM and Linux binary are available).

ipaddr.js - IP address manipulation library in JavaScript (CoffeeScript, actually)

•    CoffeeScript

ipaddr.js is a small (1.9K minified and gzipped) library for manipulating IP addresses in JavaScript environments. It runs on both CommonJS runtimes (e.g. nodejs) and in a web browser. ipaddr.js allows you to verify and parse string representation of an IP address, match it against a CIDR range or range list, determine if it falls into some reserved ranges (examples include loopback and private ranges), and convert between IPv4 and IPv4-mapped IPv6 addresses.

hipku - Encode any IP address as a haiku

•    Javascript

A tiny javascript library to encode IPv6 and IPv4 addresses as haiku. Install with npm install hipku. index.js can also be used directly in the browser.

mirrorbits - Mirrorbits is a geographical download redirector written in Go for distributing files efficiently across a set of mirrors

•    Go

Mirrorbits is a geographical download redirector written in Go for distributing files efficiently across a set of mirrors. It offers a simple and economic way to create a Content Delivery Network layer using a pure software stack. It is primarily designed for the distribution of large-scale Open-Source projects with a lot of traffic. Before upgrading to the latest version, please check this guide.

jurl - Fast and simple URL parsing for Java, with UTF-8 and path resolving support

•    Java

Fast and simple URL parsing for Java, with UTF-8 and path resolving support.The recommended medium to report and track issues is by opening one on Github.

url-parse-lax - url.parse() with support for protocol-less URLs & IPs

•    Javascript

URL to parse.Prepend https:// instead of http:// to protocol-less URLs.

public-ip-cli - Get your public IP address

•    Javascript

Get your public IP address

internal-ip - Get your internal IP address

•    Javascript

The module returns the address of the internet-facing interface, as determined from the default gateway. When the address cannot be determined for any reason, null will be returned.The module relies on operating systems tools. On Linux and Android, the ip command must be available, which depending on distribution might not be installed by default. It is usually provided by the iproute2 package.

internal-ip-cli - Get your internal IP address

•    Javascript

Get your internal IP address

ip-regex - Regular expression for matching IP addresses

•    Javascript

Returns a regex for matching both IPv4 and IPv6.Returns a regex for matching IPv4.

ipify - Get your public IP address

•    Javascript

Using the ipify API or a custom ipify instance.Returns a Promise for the IP address.

ipify-cli - Get your public IP address

•    Javascript

Using the ipify API or a custom ipify instance.