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Donation-supported home workouts, challenges and exercise resources

Short bodyweight workouts with challenges, custom sessions and progress rewards

Home workout classes, programs and shared activity challenges

Step tracking with shared challenges across phones and supported wearables

Daily step goals, streaks and challenges with optional deeper trend views

Run tracking, audio-guided sessions and shared challenges

Small interactive coding challenges

Focused Python challenges with detailed solution study

Rebuild familiar software through staged coding challenges

A roadmap linking data structures with solved coding challenges

Recreate target images with CSS in scored challenges

Interactive JavaScript study with projects and challenges

Ethereum development through practical coding challenges

Smart-contract security study through vulnerable challenges

iPhone and iPad drawing with community challenges and co-ops

Drawing challenges built around interpreting a written art prompt

Build an AI art practice around themed challenges and shared work

A workplace wellbeing platform with on-demand activity, challenges and member support

Automatically records coding activity in developers’ editors and summarizes time by project.

Interactive TypeScript challenges with community discussion

A design skill that helps AI coding agents build and refine user interfaces.

Frontend projects built against supplied designs and briefs

An AppSec workflow that tests running applications and helps coding agents find, fix, and verify exploitable issues before a pull request.

Build frontend components from challenge designs