Jsoup is a Java library for working with real-world HTML. It provides a very convenient API for extracting and manipulating data, using the best of DOM, CSS, and jQuery-like methods.

WebSocket++ is a C++ library that can be used to implement WebSocket functionality. The goals of the project are to provide a WebSocket implementation that is simple, portable, flexible, lightweight, low level, and high performance.

Kiln takes a different approach to building static sites. Instead of packing all functionality into kiln itself, the core is lightweight and can be extended with the use of external commands.

Yoga is an embeddable and performant flexbox layout engine with bindings for multiple languages.

LWP::UserAgent::Cached is an LWP::UserAgent subclass with cache support. It returns responses from the local file system, if available, instead of making an HTTP request.

CatalystX::RoleApplicator applies roles to Catalyst application classes.

QOAuth is an attempt to support interaction with OAuth-powered network services in a Qt way, i.e. simply, clearly and efficiently. It gives the application developer no more than 4 methods.

The Jetty Web Server provides an HTTP server and Servlet container capable of serving static and dynamic content either from a standalone or embedded instantiation. This package provides utility classes.

JSON-C implements a reference counting object model that allows you to easily construct JSON objects in C, output them as JSON-formatted strings and parse JSON-formatted strings back into the C representation of JSON objects. It aims to conform to RFC 7159.

This package provides a CGI and FastCGI library for C/C++ web applications. It is minimal, secure, and auditable.

The Jetty Web Server provides an HTTP server and Servlet container capable of serving static and dynamic content either from a standalone or embedded instantiation. This package provides utility classes.

Libsvgtiny takes some SVG as input and returns a list of paths and texts which can be rendered easily, as defined in http://www.w3.org/TR/SVGMobile/. It is developed as part of the NetSurf project.

This package contains helper classes for testing the Jetty Web Server.

Gophernicus is a Gopher protocol server. Its features include:

• written with security in mind;

• automatically generated Gopher menus;

• gophertags for virtually renaming directories;

• personal gopherspaces, located in ~/public_gopher/;

• virtual hosting;

• CGI support;

• output filtering and PHP support;

• charset support and conversions;

• selector rewriting;

• session tracking and statistics;

• TLS/SSL and proxy support.

LibNSFB is a framebuffer abstraction library, written in C. It is developed as part of the NetSurf project and is intended to be suitable for use in other projects too.

The overall idea of the library is to provide a generic abstraction to a linear section of memory which corresponds to a visible array of pixel elements on a display device. Different colour depths are supported and the library provides routines for tasks such as drawing onto the framebuffer and rectangle copy operations.

The LWP::MediaTypes module provides functions for handling media (also known as MIME) types and encodings. The mapping from file extensions to media types is defined by the media.types file. If the ~/.media.types file exists it is used instead.

Uhttpmock is a project for mocking web service APIs which use HTTP or HTTPS. It provides a library, libuhttpmock, which implements recording and playback of HTTP request/response traces.

This module provides a protocol-independent way to use IPv4 and IPv6 sockets, intended as a replacement for IO::Socket::INET.

This module implements HTML::TreeBuilder::XPath for HTML::TreeBuilder, making it easy to parse documents using XPath.

The Jetty Web Server provides an HTTP server and Servlet container capable of serving static and dynamic content either from a standalone or embedded instantiation. This package provides the JMX management.

This module attempts to answer, as accurately as it can, one of the nastiest technical questions there is: am I on the internet?

A host of networking and security issues make this problem very difficult. There are firewalls, proxies (both well behaved and badly behaved). We might not have DNS. We might not have a network card at all!

Starman is a PSGI perl web server that has unique features such as high performance, preforking, signal support, superdaemon awareness, and UNIX socket support.

Stunnel is a proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the programs' code. Its architecture is optimized for security, portability, and scalability (including load-balancing), making it suitable for large deployments.

WABT (pronounced: wabbit) is a suite of tools for WebAssembly, including:

1. wat2wasm translates from WebAssembly text format to the WebAssembly binary format

2. wasm2wat is the inverse; it translates from the binary format back to the text format (also known as a .wat)

3. wasm-objdump prints information about a wasm binary, similarly to objdump.

4. wasm-interp decodes ands run a WebAssembly binary file using a stack-based interpreter

5. wat-desugar parses .wat text form as supported by the spec interpreter (s-expressions, flat syntax, or mixed) and prints the canonical flat format

6. wasm2c converts a WebAssembly binary file to a C source and header file.

These tools are intended for use in (or for development of) toolchains or other systems that want to manipulate WebAssembly files.