Label Studio is a multi-type data labeling and annotation tool with standardized output format
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🎒 Token-Oriented Object Notation (TOON) – compact, human-readable serialization of JSON data for LLM prompts. TypeScript SDK, CLI, benchmarks.
Translate PDF, EPub, webpage, metadata, annotations, notes to the target language. Support 20+ translate services.
A JavaScript library for rendering music notation and guitar tablature.
OpenSheetMusicDisplay renders sheet music in MusicXML format in browsers and headless with NodeJS. Based on VexFlow, OSMD is brought to you by PhonicScore.com.
Local AI song generator with an editable score — YuE2 on your GPU: full songs with vocals, sheet music, covers, exact replay. Native Windows app, no Python, installer with auto-update.
Multitrack Web Audio editor and player with canvas waveform preview. Set cues, fades and shift multiple tracks in time. Record audio tracks or provide audio annotations. Export your mix to AudioBuffer or WAV! Add effects from Tone.js. Project inspired by Audacity.
3D Bounding Box Annotation Tool (3D-BAT) Point cloud and Image Labeling
NeoRead: a local-first EPUB/PDF reader with annotations, side-by-side translation, and AI assistance through Claude Code, Codex CLI, and Kimi CLI.
Use property paths (`a.b.c`) get a nested value from an object.
A built-time CSS library for styling React components.
Interoperable web-based DICOM slide microscopy viewer and annotation tool
Online Z-notations Editor with Prosemirror and React.js
Play MusicXML scores in the browser using Web Audio and Web MIDI.
Pixano Elements - Re-usable web components dedicated to data annotation tasks.
Inline review tool for MDXG markdown — capture highlighted comments and export them as structured JSON for LLM agents.
Do notation pipes for Promise-based or pure functions which easy to mock