HTTP::Lite is a stand-alone lightweight HTTP/1.1 implementation for perl. It is intended for use in situations where it is desirable to install the minimal number of modules to achieve HTTP support. HTTP::Lite is ideal for CGI (or mod_perl) programs or for bundling for redistribution with larger packages where only HTTP GET and POST functionality are necessary. HTTP::Lite is compliant with the Host header, necessary for name based virtual hosting, and supports proxies. Additionally, HTTP::Lite supports a callback to allow processing of request data as it arrives.

IcedTea-Web is an implementation of the Java Network Launching Protocol, also known as Java Web Start. This package provides tools and libraries for working with JNLP applets.

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.

Wslay is an event-based C library for the WebSocket protocol version 13, described in RFC 6455. Besides a high-level API it provides callbacks for sending and receiving frames directly. Wslay only supports the data transfer part of WebSocket protocol and does not perform the opening handshake in HTTP.

This module provides functions that deal with the date formats used by the HTTP protocol.

NetSurf is a lightweight web browser that has its own layout and rendering engine entirely written from scratch. It is small and capable of handling many of the web standards in use today.

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

This perl module provides a wrapper around URI templates as described in RFC 6570.

Yder is a logging library written in C. It can log messages to the console, a file, syslog, journald, or a callback function.

Hiawatha has been written with security in mind. Features include the ability to stop SQL injections, XSS and CSRF attacks and exploit attempts.

Catalyst::Component::InstancePerContext returns a new instance of a component on each request.

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.

Siege is a multi-threaded HTTP/FTP load tester and benchmarking utility. It can stress test a single URL with a user defined number of simulated users, or it can read many URLs into memory and stress them simultaneously. The program reports the total number of hits recorded, bytes transferred, response time, concurrency, and return status.

Libnspsl is a library to generate a static code representation of the Public Suffix List. It is developed as part of the NetSurf project.

This module provides a convenient way to set up a CGI environment from an HTTP::Request.

The Net::HTTP class is a low-level HTTP client. An instance of the Net::HTTP class represents a connection to an HTTP server. The HTTP protocol is described in RFC 2616. The Net::HTTP class supports HTTP/1.0 and HTTP/1.1.

CGI::FormBuilder provides an easy way to generate and process CGI form-based applications.

Libnslog provides a category-based logging library which supports complex logging filters, multiple log levels, and provides context through to client applications. It is developed as part of the NetSurf project.

Iter Vitae is a command-line utility that allows you to generate a Resume / CV, by reading a S-expression version of your CV details (in Scheme code).

With a MVC approach, it lets you separate the data from the presentation (how the document looks).

This tool creates a web-site version of your CV (using SXML and Olive CSS), and is designed for long-term use, so you can update and evolve your CV over the years. The program supports multilingual content and is fully extensible.

Hurl is a command line tool that runs HTTP requests defined in a plain text format. It can chain requests, capture values and evaluate queries on headers and body response. This package also provides hurlfmt, a formatter and linter for Hurl files.

This package provides a collection of modules (vmods) for the Varnish cache server, extending the VCL with additional capabilities.

Cat avatar generator is a generator of cat pictures optimised to generate random avatars, or defined avatar from a "seed". This is a derivation by David Revoy from the original MonsterID by Andreas Gohr.

WASI Libc is a libc implementation for WebAssembly programs using the WebAssembly System Interface (WASI). It provides C library functionality for compiling C and C++ programs to WebAssembly that can run outside the browser. The library supports multiple WASI targets including wasm32-wasi, wasm32-wasip1-threads, and wasm32-wasip2.

Qhttp is a light-weight and asynchronous HTTP library (both server & client) in Qt5 and C++14.