- https://github.com/d-led/pathdebug - trace how ENVs (e.g. PATH) are set and overriden
That are occasionally useful (for the Paqmind infrastructure).
- https://www.vercel-status.com – live status of Vercel services
- https://status.digitalocean.com – live status of Digital Ocean services
- https://status.npmjs.org – live status of NPM services
- https://wetransfer.com – share files
- https://bundlejs.com/ – the cost of bundling a package
- https://miragejs.com – mock server API on the client
- https://photopea.com
- https://draw.io – draw diagrams (Visio clone)
- https://whimsical.com – draw diagrams (multiple types)
- https://regex101.com – invaluable RegExp debugger
- https://crontab.guru – create Cron tabs
- https://alex7kom.github.io/nano-nanoid-cc – UID collision calculator
- https://zelark.github.io/nano-id-cc/ – ID collision calculator
- https://app.k6.io – performance/load testing
- https://blazemeter.com – performance/load testing
- https://loader.io - didn't try
- https://www.webpagetest.org – performance, security, SEO, etc checks
- https://observatory.mozilla.org – performance, security checks
- https://gtmetrix.com – another good MANY-IN-ONE checker
- https://yellowlab.tools – simple overview MANY-IN-ONE checker
- https://swapi.dev/ – Star Wars API (REST)
- https://jsonplaceholder.typicode.com/ – classic API placeholder server (REST)
- https://api.spacex.land/graphql/ - SpaceX API (GraphQL, REST, read-only)
- https://fast.io – statis hosting with automatic Google Drive (Dropbox, etc) <-> AWS S3 synchronization
- https://imagekit.io – image hosting with live resize (first time that I see sharp resize, amazing)
- https://ezgif.com – make GIFs
- https://jakearchibald.github.io/svgomg – optimize SVG
- https://www.photopea.com – free PS alternative with similar UI/UX & shortcuts 👍
- https://transfonter.org – generate web font files (otf -> woff, etc)