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Label Studio is a multi-type data labeling and annotation tool with standardized output format

Translate PDF, EPub, webpage, metadata, annotations, notes to the target language. Support 20+ translate services.

Supercharge Git inside VS Code and unlock untapped knowledge within each repository — Visualize code authorship at a glance via Git blame annotations and CodeLens, seamlessly navigate and explore Git repositories, gain valuable insights via rich visualizations and powerful comparison commands, and so much more

purocean / yn

A highly extensible Markdown editor featuring version control, AI Copilot, document annotations, mind maps, document encryption, executable code snippets, chart embedding, HTML applets, plugins, and macro replacement. Its integrated sidebar terminal makes working with AI faster and more convenient.

mitre-attack / attack-navigator

Web app that provides basic navigation and annotation of ATT&CK matrices

naomiaro / waveform-playlist

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.

xtreme1-io / xtreme1

Xtreme1 is an all-in-one data labeling and annotation platform for multimodal data training and supports 3D LiDAR point cloud, image, and LLM.

ifer47 / markeron

Lightweight (~1.5 MB) open-source screen annotation with click-through mode and keyboard-first shortcuts. For demos, teaching, meetings & screen recording. Windows, macOS.

expressive-code / expressive-code

A text marking & annotation engine for presenting source code on the web.

annotorious / annotorious

Add image annotation functionality to any web page with a few lines of JavaScript.

cynicalight / reader

Local-first EPUB/PDF reader with annotations and AI assistance through Claude Code and Codex CLI. Built with React, TypeScript, shadcn/ui, Go, and Electron.

hashfunction / MarkuprPlus

Record your screen, narrate the bug, and hand your AI coding agent structured Markdown - one annotated screenshot per mark. Desktop app, CLI, and MCP server for Claude Code, Cursor, Codex, and Windsurf. On-device Whisper transcription, local-first, MIT.

Dai0-2 / paperflow

Browser-native research workspace for Chrome. Read, annotate, ask with page context, remember, and organize papers.

Open-Capture / opencapture

Free, 100% local full-page screenshot extension for Chrome, Edge and Firefox — capture a whole page as one image, then crop, annotate, blur and export to PNG or PDF. No uploads, no account. Rust/WebAssembly core, AGPL-3.0.

alan890104 / claude-code-paste-preview

See and mark up the images you paste into Claude Code: thumbnails, and an editor that opens on paste. macOS, Linux and Windows.

nightire / ainotation

DOM feedback, live drawing and screenshot annotations with local MCP integration. Source available; commercial use requires authorization.

izum-vinipuhov / Izum-StoryFlow

Izum StoryFlow is an open‑source cross‑platform ebook reader (Next.js/Tauri v2) supporting EPUB, PDF, MOBI, FB2, TXT, MD. Features: scroll/page modes, search, bookmarks, annotations, dictionaries/translation, split‑screen, themes, sync. Also TTS, audio sync, OPDS/Calibre, Yandex Books, and self‑hosted sync server.

l1veIn / rambledesk

Generative UI for working with coding agents. Review, annotate, brainstorm, and give feedback through task-specific desktop workbenches.

vincenzo-afk / PenFlow

Local-first handwriting studio for study-ready notebook pages, stylus annotations, and replay exports.