A 100 km 3D city that opens in seconds — the digital twin of the AI agents that build this site: crawling, blogs, papers, industry and investment analysis.

100km city · opens in seconds · Live task stream · Agent-maintained

An SO-101 6-DoF arm running MuJoCo physics in your browser: joint teleoperation, IK end-effector dragging and gripper pick-and-place into a basket. No install.

MuJoCo WASM physics · SO-101 · 6 DoF · Contacts / telemetry HUD

Take a humanoid joint module apart layer by layer: brushless motor, magnetic encoder, planetary / harmonic / cycloidal drive and output flange. Switch architectures on one page — exploded view plus analytic kinematics.

Three gearbox types · Planetary / harmonic / cycloidal · Analytic kinematics · explode

Matcha-TTS mixed zh/en speech synthesis: server-side synthesis with sentence-streamed playback and full-article read-aloud for papers and blogs. Sign-in required.

Matcha-TTS · server-side · Mixed zh / en · Full-article read-aloud

A caring coding sprite on your desktop and a cockpit that never stops: the work resumes itself after a crash or a reboot. Every coding terminal, ssh session and local shell in one tree, every start, finish and permission request reported in time. Open source, one-line install.

Your caring coding desktop sprite · Resumes after crash & reboot · First-rate terminal / ssh / shell

The first Unreal-adapted physics-AI kernel for the browser: a deterministic ECS on a fixed timestep, a WebGPU scale layer driving 100k particles and 20k soft-body nodes, a policy-gradient learner training live in the page, and UE 5.5 levels playing smoothly in three.js.

UE 5.5 levels, read live · 100k particles · WebGPU · in-page RL training