Exercism
exercism.orgLanguage practice with exercises and mentoring
Language practice with exercises and mentoring
Browser-based live coding of musical patterns
Build custom apps with AI and edit them with no code.
AI interview copilot for coding, system design and behavioral rounds
A roadmap linking data structures with solved coding challenges
Proxima Nova, original display fonts and the free Anonymous Pro coding family.
Use a Vim-based editor with Lua configuration, a documented API, and remote-procedure-call support for extensions.
A beginner-focused BASIC IDE with instant graphics, a step debugger, and a browser-based WebAssembly edition.
App builder that works with the AI coding agent you already use
AI model from Moonshot AI for reasoning, coding, and agentic tasks.
Pattern-based live coding for algorithmic music
Document capture that sends source-backed transactions to accounting
Coding tutorials and practice with online development tools
A no-code app builder for designing, building, and publishing iOS, Android, and web apps.
A Python-focused desktop IDE with project management, debugging, code checks, and an extensible plug-in system.
Frontend projects built against supplied designs and briefs
A KDE editor for multi-file coding with split views, project navigation, search, and plugins.
Code interviews and explore research themes with AI linked to original passages.
A collection of games teaching web-development concepts
Design cloud infrastructure visually and generate Terraform code for AWS.
AI web developer that builds and publishes websites from chat prompts