- postwoman.io: API request builder
- responsively.app: See how your project looks on various devices
- insomnia.rest: REST client and API design platform
- public-apis.io: List of free APIs for developers
- Lorem Picsum: Random placeholder images based on size
- css.gg: Open source CSS icons
- compressor.io: Compress images online
- Google Fonts: Open source fonts
- landingfolio: Landing page design inspiration
- lapa.ninja: Landing page design inspiration
- squoosh.app: Compress images and edit image size
- shape divider: Generate dividers for your website
- animista: CSS animation inspiration and snippets
- webframe: Design inspiration based on real websites
- fontspark: Discover fonts
- error404.fun: Free illustrations for 404 pages
- blush.design: Free illustrations with Figma plugin
- usesmash: Illustration constructor
- control: customisable illustrations
- drawkit: Free illustrations updated weekly
- opendoodles: Free sketchy illustrations
- Freellustrations: Awesome illustrations for landing pages
- mixkit: Free illustrtions, stock videos and music
- delesign: Minimal illustrtions for free
- regexr: Learn, Build, & Test RegEx
- overapi.com: Online regex tester and debugger
- ihateregex: RegEx creation helper