Some links that I have slowly been gathering and often refer to...

• https://blockchaindemo.io/ - Web based blockchain demo tool
• https://www.jsonstorage.net/ - Free public and private JSON storage behind a simple REST API
• https://crontab.guru/ - A quick and simple editor for cron schedule expressions
• https://dstein64.github.io/gifcast/ - asciinema file to gif in browser
• https://filebin.net/ - Convenient free file sharing on the web, without registration, for 1 week.
• https://n8n.io/ - Free & Open Extendable workflow automation
• https://notebooksharing.space/ - The fastest way to share your notebooks
• https://canarytokens.org/ - Quick, Free, Detection for the Masses
• https://12ft.io/ - Show me a 10ft paywall, I’ll show you a 12ft ladder (Sometimes doesnt load...)
• https://www.duckdns.org/domains - free dynamic DNS hosted on AWS
• https://www.sejda.com/crop-pdf - Crop all pages of a PDF (automatic or manual)
• https://www.dns.toys/ - Useful utilities and services over DNS (weather, conversion etc)
• https://flatgithub.com/ - View flatfile data from Github in a nice table
• https://file.pizza/ - In browser P2P file sharing

• https://make-everything-ok.com/

• https://whatmodelscanirun.com/ - Pick the right model for your GPU — in seconds

• https://mockbin.io/ - Allows you to quickly mock an API endpoint
• https://httpdump.app/ - Easily inspect incoming HTTP Requests
• https://termbin.com/ - Netcat-based command line pastebin
• https://bashupload.com/ - Bash based temporary file upload bin
• https://3v4l.org/ - Online PHP editor across versions
• https://sed.js.org/ - GNU sed live editor
• https://awk.js.org/ - GNU awk live editor
• https://mholt.github.io/json-to-go/ - Instantly converts JSON into a Go type definition
• https://zhwt.github.io/yaml-to-go/ - Instantly converts YAML into a Go type definition
• https://jqplay.org/ - jq playground
• https://amber-lang.com/ - The Programming Language compiled to Bash.
• https://cidr.xyz/ - Interactive IP address and CIDR range visualizer
• https://asciiflow.com/#/ - Easily create ASCII diagrams online
• https://sourcegraph.com/search - Public code search
• https://curl2url.com/ - Link to curl results
• https://mockae.com/ - Fake APIs using Lua for dynamic response generation
• https://github-ratelimit-monitor.addshore.com/ - View and graph your GitHub API rate limits

• https://screenshot.guru/ - Takes screenshots for you online
• https://archive.ph/ - My url is alive and I want to archive its content
• https://allourideas.org/ - Wiki Survey, collaboratively sorting ideas
• https://wikidata.metaphacts.com/ - Metaphactory + Wikidata = Ontological tree exploration in diagrams
• https://www.freewordcloudgenerator.com/generatewordcloud - Word cloud generator

• https://deepai.org/machine-learning-model/colorizer - Image colourization API
• https://hackertyper.com/ - Make it look like you are hacking
• https://github.com/hugomd/parrot.live - Curl an animated parrot into your terminal

• https://raw.githubusercontent.com/gregsramblings/google-cloud-4-words/master/DarkPoster-lowres.png - Google Cloud developer cheat sheet

• https://raould.github.io/pn0gstr0m/ - all the pn0gs are to be str0mmed
• http://sshtron.zachlatta.com/ - Try ssh sshtron.zachlatta.com
• https://th0mas.nl/downloads/pdftris.pdf - Tetris in a PDF

• https://windirstat.net/ - disk usage statistics viewer and cleanup tool
• https://getsharex.com/ - Screen capture, file sharing and productivity tool