Waybackpack is a command-line tool that lets you download the entire Wayback Machine archive for a given URL.
The coach helps you find performance problems on your web page. Think of the coach as a modern version of YSlow. The coach will give advice of how your page can be faster.
WhatWeb identifies websites. Its goal is to answer the question, “What is that Website?”. WhatWeb recognises web technologies including content management systems (CMS), blogging platforms, statistic/analytics packages, JavaScript libraries, web servers, and embedded devices. WhatWeb has over 900 plugins, each to recognise something different. WhatWeb also identifies version numbers, email addresses, account IDs, web framework modules, SQL errors, and more.
The global fetch function is an easier way to make web requests and handle responses than using an XMLHttpRequest. This polyfill is written as closely as possible to the standard Fetch specification at https://fetch.spec.whatwg.org.
Caddy is a lightweight, general-purpose web server for Windows, Mac, Linux, BSD and Android. It is a capable alternative to other popular and easy to use web servers. (@caddyserver on Twitter)
The most notable features are HTTP/2, Let's Encrypt support, Virtual Hosts, TLS + SNI, and easy configuration with a Caddyfile. In development, you usually put one Caddyfile with each site. In production, Caddy serves HTTPS by default and manages all cryptographic assets for you.
The simplest app for Bootstrap prototyping. Create quality HTML prototypes quickly, using popular open source tools like Bootstrap, LESS, Fontawesome and more. Work visually and with sources simultaneously, with no need to export. Easily integrates into developers' toolsets (Git, text editors, etc.) Works with plain HTML and LESS files. Generate only standard Bootstrap 3.3 HTML and LESS markup.
Monitor the accessibility of your websites with pa11y-dashboard, and protect against accessibility errors creeping into your codebase.
Nativefier is a command line tool that allows you to easily create a desktop application for any web site with succinct and minimal configuration. Apps are wrapped by Electron in an OS executable (.app, .exe, etc.) for use on Windows, OSX and Linux.
Include the Crosswalk Project web runtime with your hybrid Android or Cordova / PhoneGap app, and users will consistently see it through a predictable, powerful WebView based on Google Chromium.
The Crosswalk Project Advantage:
Get consistent, predictable behavior by reducing Android device fragmentation.
Use the latest web innovations and APIs. Provide a feature rich experience on all Android 4.0+ devices.
Easily debug with Chrome DevTools.
Improve the performance of your HTML, CSS, and JavaScript.
Building blocks for the virtual reality web
Use markup to create VR experiences that work across desktop, iPhones, and the Oculus Rift
Gain competitive insight into any website or domain name, compare and optimize businesses on the web using our comprehensive website dataset. Enter a domain name, an IP address, a keyword, an Adsense ID and see the website's traffic sources & technology, their online marketing strategies, the registration date, the location, server details, related websites, Alexa score, Google Pagerank, Pagespeed, MozRank and much more.
H2O is a new generation HTTP server providing quicker response to users when compared to older generation of web servers. The server takes full advantage of HTTP/2 features including prioritized content serving and server push, promising outstanding experience to the visitors of your web site.
History of the browser user-agent string
Metaflop is an easy to use web application for modulating your own fonts. Metaflop uses Metafont, which allows you to easily customize a font within the given parameters and generate a large range of font families with very little effort.
boomerang is a piece of javascript that you add to your web pages, where it measures the performance of your website from your end user's point of view. It has the ability to send this data back to your server for further analysis. With boomerang, you find out exactly how fast your users think your site is.
InstantClick is a JavaScript library that dramatically speeds up your website, making navigation effectively instant in most cases.
Online test to help speeding up heavy web pages
Diagnostic.css is a stylesheet which allows the user to test for common errors in a page's markup.
Chrome extension for detecting and simulating frontend Single Points Of Failure. Detects likely third-party single points of failure as you browse and allows you to Simulate 3rd party resources being unavailable.
Also, here: https://chrome.google.com/webstore/detail/spof-o-matic/plikhggfbplemddobondkeogomgoodeg
Burp Suite is an integrated platform for performing security testing of web applications. Its various tools work seamlessly together to support the entire testing process, from initial mapping and analysis of an application's attack surface, through to finding and exploiting security vulnerabilities.