Useful Links

Introduction

There are a couple of interesting child pages, so don't forget to check them out, via the site menu.

General Technical

CyberChef - this is a fantastic toolbox to keep handy and does amazing things. You simply drag an Operation into the Recipe and type some Input, then you will see Output. There is an example at From Base64 - CyberChef which might help

Maths

Free Printable Graph Paper - includes a virtual version as well

Sounds

Noisli - Improve Focus and Boost Productivity with Background Noise - does what it says and very well too
Hipstersound | Ambient noise generator to create a positive work environment - an alternative

Untested Software

This is software I am aware of and that should be good but I have not used:

Web Browsers

How do browsers work (2012) - http://blog.mozilla.org/webdev/2012/05/04/how-browser-engines-work/
What do the different browsers support - Can I use... Support tables for HTML5, CSS3, etc
Handy testing site from Microsoft - Interoperability, Browser & Cross-Platform Testing : Microsoft Edge Dev
See how you are tracked - Lightbeam for Firefox — Mozilla

Software

Notepad++ - http://notepad-plus-plus.org/
Handy Directory Sizing - WinDirStat - Windows Directory Statistics
The Linux version of WinDirStat is called "kdirstat" and should be available via your package manager
PE Studio - winitor for Malware Analysis

Support

Handy support details - Support Details | Tech Support Management

Web Site Icons

Icons for iOS and Android - http://www.zen.co.uk/blog/setting-a-home-screen-icon-for-your-website-on-ios-and-android-devices/
More Detail re iOS - http://mathiasbynens.be/notes/touch-icons

Network Tools

Website link, IP and redirect info - Domain Name Data - host.io
What is my IP Address - http://whatismyipaddress.com/
What is my IP - http://www.whatismyip.com/ (preferred)
Working out Subnets and Masks like 10.48.0.0/23 - http://www.subnet-calculator.com/
DomainTools has an excellent WhoIs service - http://www.domaintools.com/research/
Comprehensive tools - http://network-tools.com/
IP Address - http://ipaddress.org/
Mail Testing - http://mxtoolbox.com/
SpeedTest.net - http://www.speedtest.net/
BT Speed Test - http://speedtest.btwholesale.com/ complete with some good advice for testing
NetFlix Speed Test - Internet Speed Test | Fast.com

Domains

ICANN WHOIS - WHOIS Search | ICANN WHOIS

Geo Location

IP Address Labs - http://www.ipaddresslabs.com/IPGeolocationServiceDemo.do
IP Address to Location - http://www.ip2location.com/demo

Internet Access

SamKnows - Broadband Availability Checker

Dates and Times

Time zone conversion - timeanddate.com
Convert to/from milliseconds - Current Millis ‐ Milliseconds since Unix Epoch

Useful Articles

Window Logon Issue Diagnosis - http://greigmitchell.co.uk/the-case-of-the-delayed-logon-screen/ is a useful article on using SysInternals Process Monitor to diagnose logon issues.
Making a Wi-Fi Hotspot - How to turn your Windows laptop into a WiFI Hot Spot | Dell UK more easily done with your phone

Software Development

Windows 8 Phone App Development - http://channel9.msdn.com/Series/Building-Apps-for-Windows-Phone-8-Jump-Start
Storing Passwords - Serious Security: How to store your users’ passwords safely | Naked Security

Stress or Load Testing

Intel Processor Diagnostics Tool - http://www.intel.com/support/utilitytools.htm
Older SysInternals tools - http://blogs.msdn.com/b/vijaysk/archive/2012/10/27/tools-to-simulate-cpu-memory-disk-load.aspx, I recommend using the -c parameter with testlimit, the memory tool, -c with a suitable number stops it grabbing all the memory which can render your machine unusable!
See also Consume in the Windows Server 2003 Resource Kit

Web Site Testing

Sitespeed.io - Welcome to the wonderful world of Web Performance
WebPagetest - Website Performance and Optimization Test

Windows 10

Download for Installing - Windows 10

Windows 7

Wireless Networking - http://technet.microsoft.com/en-us/magazine/ff847520.aspx

English Language

The Apostrophe - http://oxforddictionaries.com/words/apostrophe

Shell Scripts

Bash Guide - http://mywiki.wooledge.org/BashGuide/Practices
Portable Shell Scripts - http://www.in-ulm.de/~mascheck/various/portability/
Making Bash Scripts Portable - http://wiki.bash-hackers.org/scripting/nonportable

Software Analysis

PEStudio, used in anti-malware - winitor

Passwords

Security Tools

Security Tools Top 10 (2013) - ToolsWatch.org – The Hackers Arsenal Tools » 2013 Top Security Tools as Voted by ToolsWatch.org Readers
MD5 File - HTML5 File Hash Online Calculator - MD5, SHA1, SHA2 (SHA-256), SHA-384, SHA-512
Security Planner - gives some good security advice

SSL

SSL Labs - Qualys SSL Labs - Projects / SSL Server Test
Symantec - SSL Toolbox
Hardeniuze, site testing - Hardenize: Comprehensive web site configuration test

Hardware

CPU (Processor) Benchmarks - PassMark Software - CPU Benchmark Charts
SMART Hard Drive Status Utility - smartmontools
Using smartmontools blog page - Mike's Technology and Finance Blog: How To Detect a Failing Hard Drive

Phonetic Alphabet

NATO phonetic alphabet - Wikipedia, the free encyclopedia

UK Motoring

Google

Google Location history

AppData files

Linux uses AppData files to show application information.
Chapter 2. Upstream Metadata
AppData Specification

Unicode

Dark corners of Unicode / fuzzy notepad

AS2

This is a file transfer format, however OpenAS2 Server Application is a useful open source product.

Disk Utilities

Linux based partition utility - GParted -- A free application for graphically managing disk device partitions, not use myself
Commercial disk/partition utility - Disk Management Software - Acronis Disk Director 12 which I heartily recommend

HTML 5

<input> - HTML | MDN - be sure to use the correct or best type
HTML Standard - the definitive spec on HTML 5
HTML5test - How well does your browser support HTML5? - test your browser

Linux

Relax-and-Recover - Linux Disaster Recovery - stumbled upon this, never used but looks interesting

Travel

Network West Midlands - Tram or National Express Midland Metro - Birmingham Trams
Stagecoach Supertram: home - Sheffield Trams
Every Journey Matters - Transport for London - TfL
Raildar - Historic train arrival times
OpenTrainTimes

Qt

How to start with Qt? | nidomiro - a good introduction
C++ Qt Programming - YouTube - some introduction videos

General

Alexa Top 500 Global Sites - most popular websites
Have I been pwned? Check if your email has been compromised in a data breach - "haveibeenpwned" is run by Troy Hunt, security researcher, so can be trusted
General Data Protection Regulation (GDPR) – Final text neatly arranged - for the full GDPR documentation

Sightseeing Ideas

Tower Bridge | London’s Famous Bridges | London Landmarks

Personal Security/Safety

Stay safe in London | The Met
Theft tactics: Be Aware of thieves' tactics | British Transport Police

Mapping

History

Rail Map online - historical rail maps

Gaming

Godot Engine - Free and open source 2D and 3D game engine

Remote Working

Home | mRemoteNG - colleagues have used this, looks worth trying
Remote Desktop Manager - Remote connection and password management software - installed on client's machines, commercial product, possibly worth a look

Sheffield

Picture Sheffield - Images of Sheffield from the council archive
Northern Powergrid | Power Cuts - check if you have an electrical power cut in Sheffield, Yorkshire or the North East

Health

BMI healthy weight calculator - Health tools - NHS Choices

Speaking

Julian Treasure: How to speak so that people want to listen | TED Talk

Audio Visual

Quod Libet is written in Python and uses a Python library for manipulating audio file metadata, specifically the tags, see Overview — mutagen for details.

Communication

Discord - Free Voice and Text Chat for Gamers - for gamers to replace Skype or TeamSpeak but can be used generally
Video Meetings, Video Conferencing, and Screen Sharing - Whereby (formally appear.in) - meeting focused, supports screen sharing, either with a Chrome extension, or it just works in Firefox
Zoom - supports conferences
Firefox Send - for file sharing
Jitsi Meet - secure and free video conferencing

System Integration

The following sites might be useful for solutions you are building:

Coronavirus

Specifically COVID-19