Free
Exercism
Open SourcePractice & Challenges · Documentation & Learning
Free coding practice and mentoring in 70+ languages.
practicementoringexercises
Browse the complete directory — use filters to narrow down.
Practice & Challenges · Documentation & Learning
Free coding practice and mentoring in 70+ languages.
SQL Tools
Modern PostgreSQL EXPLAIN plan visualizer by Dalibo.
SQL Tools
Long-standing PostgreSQL EXPLAIN plan analyzer and visualizer.
CLI Tools · Development Environment
Explains any shell command by matching it to man page text.
Conversion · Image & Media
Online GIF maker and editor: resize, crop, optimize, convert.
Generators · CSS Tools
Create organic blob shapes with eight-value border-radius.
Favicons & Social Images · Image & Media
Generate favicons from text, emoji or images in all sizes.
Design Tools · Design & Prototyping
Figma's marketplace of free UI kits, plugins, templates and wireframe libraries from the community.
Learning & Reference · CSS Tools
Learn Flexbox by guiding frogs to lily pads in a fun game.
Design Systems · Design & Prototyping
Microsoft's cross-platform design system.
Typography & Fonts · Design & Prototyping
Indian Type Foundry's free font service — professionally designed families, free for commercial use.
Hosting & Collaboration · Git & Version Control
Community-driven, self-hosted software forge (powers Codeberg).
Courses & Tutorials · Documentation & Learning
Non-profit curriculum with free courses and certifications.
Other Formats · Data Formats
Free online formatters, validators, encoders and escape tools.
Stock & Placeholders · Image & Media
Collaborative database of CC-licensed sound effects and samples — the go-to library for UI sounds and foley.
Cheatsheets & Learning · Git & Version Control
Find the right Git commands without searching through man pages.
Hosting & Collaboration · Git & Version Control
Lightweight, self-hosted Git service written in Go.
Hosting & Collaboration · Git & Version Control
Dynamic GitHub profile cards — stats, top languages and streaks rendered as embeddable SVGs.
Cheatsheets & Learning · Git & Version Control
Generate useful .gitignore files for your stack.
Generators · CSS Tools
Generate frosted-glass CSS effects with backdrop blur.
Inspiration & Galleries · Design & Prototyping
A curated gallery of astonishing websites — a tight, high-quality alternative to endless scroll.
Web Analytics · Monitoring & Observability
Google's free webmaster console — indexing status, search queries, sitemaps and Core Web Vitals data.
Learning & Reference · CSS Tools
Learn CSS Grid by watering carrots in an interactive game.
Passwords & IDs · Security
Online GUID/UUID generator with many formatting options.