timoncool / YuE2-Studio

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.

ShareX / ShareX

Free, open-source Windows app for screen capture, screen and GIF recording, annotation, OCR, and uploading files to many destinations.

erupts / erupt

Code as configuration. Annotate a Java entity with @Erupt and ship a production-grade admin backend in minutes — UI, RBAC, audit logs and APIs, all generated at runtime. No codegen, no frontend.

logseq / logseq

Open-source, local-first note-taking and knowledge management app with outlining, bidirectional links, PDF annotation, and task management.

gildas-lormeau / SingleFile

Web Extension for saving a faithful copy of a complete web page in a single HTML file

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.

HumanSignal / label-studio

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

bwuxqdmgyeub / pdf-annotate

Edit PDFs in-browser: add text, highlights, stamps, freehand ink; fill forms, merge pages, export annotated PDFs.

1003129155 / jietuba

Open-source Windows screenshot tool with scrolling capture, annotation, OCR, translation, pinned-image editing, GIF recording and clipboard history. 开源 Windows 截图工具：长截图、标注、OCR、翻译、钉图编辑、GIF 录制与剪贴板历史。

windingwind / zotero-pdf-translate

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

CVHub520 / X-AnyLabeling

X-AnyLabeling: A lightweight, efficient, and unified cross-platform desktop application for annotating text, image, video, point cloud and multimodal data, combining versatile built-in tools with state-of-the-art AI models and flexible multi-format export.

toon-format / toon

🎒 Token-Oriented Object Notation (TOON) – compact, human-readable serialization of JSON data for LLM prompts. TypeScript SDK, CLI, benchmarks.

Dai0-2 / paperflow

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

greenshot / greenshot

Greenshot is a free Windows screenshot tool for capturing regions, windows, or full screens with annotation and export options.

Kareadita / Kavita

Kavita is a fast, feature rich, cross platform reading server. Built with the goal of being a full solution for all your reading needs. Setup your own server and share your reading collection with your friends and family.

cvat-ai / cvat

CVAT is a leading data annotation platform for image, video, audio, and 3D datasets. It offers open-source, cloud, and enterprise products, as well as labeling services, with AI-assisted labeling, quality assurance, team collaboration, analytics, and developer APIs.

musescore / MuseScore

MuseScore is an open source and free music notation software. For support, contribution, bug reports, visit MuseScore.org. Fork and make pull requests!

lzhgus / Capso

Open-source screenshot and screen recording for macOS. The free, native alternative to CleanShot X. Built with Swift 6.0 and SwiftUI.

plannotator / herdr-annotate

Annotate terminal text, review documents and agent replies in Herdr, and send the feedback straight back to the agent.

realskyrin / capcap

⌘⌘ - A lightweight, native macOS screenshot tool that lives in your menu bar. Double-tap ⌘ Command to capture any region of your screen — instantly copied to clipboard, or annotate first with pen and mosaic tools.

yuxino / Kiri

截图、录屏和文字识别工具，支持 macOS、Windows、Linux。Screenshots, screen recording, and OCR for macOS, Windows, and Linux.

crystal-lang / crystal

Crystal is a statically type-checked, compiled programming language with Ruby-like syntax and no required type annotations.

xournalpp / xournalpp

Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input from devices such as Wacom Tablets.

facebook / pyrefly

A fast type checker and language server for Python

argilla-io / argilla

Argilla is a collaboration tool for AI engineers and domain experts to build high-quality datasets

Satty-org / Satty

Satty - Modern Screenshot Annotation.

plannotator / plannotator-tui

Annotate Markdown in the terminal: select, comment, looks-good, delete; send the review to your agent.

alyssaxuu / screenity

The free and privacy-friendly screen recorder with no limits 🎥

OpenAEC-Foundation / open-pdf-studio

An open source PDF viewer/editor with it's own blazing fast rust engine

KartikLabhshetwar / better-shot

Screenshot, screen recording, and video editor for macOS. Native SwiftUI app with capture deck, 75+ customizable shortcuts, URL scheme automation, and self-hosted cloud sharing. Open-source alternative to CleanShot X and Loom.

jiuwanzi-hui / Screenshot

SnapCut（简截）——轻巧但不将就的 Windows 和 macOS 截图工作台：框选截图、长截图、区域录屏、钉图取色、标注、OCR 与翻译一体化。支持保留右键菜单和悬浮提示，数据永久留在本机。

jimmgreen / LumaShot

Windows screenshot, annotation, offline OCR, clipboard history, GIF and screen recording.

wkentaro / labelme

Image annotation with Python. Supports polygon, rectangle, circle, line, point, and AI-assisted annotation.

AlexanderVanhee / Gradia

Make your screenshots ready for all

umputun / revdiff

TUI for reviewing diffs, files, and documents with inline annotations

khoj-ai / openpaper

Open Paper is a workbench for managing your research library. Read, annotate, and understand your papers all in one place. Use an AI assistant to conduct your literature review.

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.

ron-rs / ron

Rusty Object Notation

Pantheon-Industries-Inc / argus

Argus is an open source dataset-and-format-agnostic harness for the densest annotation of robot learning data.

gitkraken / vscode-gitlens

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

yatengLG / ISAT_with_segment_anything

Labeling tool with SAM(segment anything model),supports SAM, SAM2, SAM3, sam-hq, MobileSAM EdgeSAM etc.交互式半自动图像标注工具

DmytroVasin / DrawPen

DrawPen is a simple screen annotation. Available on macOS, Windows & Linux.

EmirErtorer / ink-away.koplugin

A drawing, note-taking and book annotation app for KOReader, built for e-ink: drawings with layers, notebooks with handwriting to text, ink on EPUB, MOBI, PDF and comics that follows the text, and stylus support with palm rejection and pen pressure.

SDWebImage / SDWebImage

Objective-C library for asynchronously downloading and caching images, with UIImageView, UIButton, and MKAnnotationView categories.

penrose / penrose

Create beautiful diagrams just by typing notation in plain text.

ksnip / ksnip

ksnip the cross-platform screenshot and annotation tool

paulrosen / abcjs

javascript for rendering abc music notation

opensheetmusicdisplay / opensheetmusicdisplay

OpenSheetMusicDisplay renders sheet music in MusicXML format in browsers and headless with NodeJS. Based on VexFlow, OSMD is brought to you by PhonicScore.com.

CoderLine / alphaTab

alphaTab is a cross platform music notation and guitar tablature rendering library.

suzuki-shunsuke / pinact

pinact is a CLI to edit GitHub Workflow and Composite action files and pin versions of Actions and Reusable Workflows. pinact can also update their versions and verify version annotations.

syabro / neat-annotations

Hand-drawn CSS annotations for inline content

sonic-visualiser / sonic-visualiser

Visualisation, analysis, and annotation of music audio recordings

devmobasa / wayscriber

Live overlay for drawing, annotating, presenting with zoom, hiding text, and capturing screenshots on Linux. Can be used as whiteboard or blackboard. Packed with features. Highly customisable. Written in Rust.

rust-lang / annotate-snippets-rs

Library for snippet annotations

Heyosseus / sloppy

Static analysis for the debt AI agents leave in PHP: 33 rules, Claude Code hooks, git-diff review, a Rector and Pint fix pass, Pest expectations, CI annotations and an MCP server. Deterministic, local, no LLM.

omdsh-dev / dsh-annotation

DSH Web 选中批注插件：选文字→批注→回车随消息发送；气泡隐藏批注块（零闪烁）；回复按 Annotation N 逐条对照（可悬浮芯片）。官方 bundle，零核心改动

migsilva89 / imark

Native Markdown reader for macOS. Keep it open while you write and it follows every save. Comment on a phrase and the note is saved into the .md file itself. Your coding agent can open a plan here and wait while you mark it up.

joshlin2201 / itspaint

MS Paint for the Mac. Mark up screenshots or paint from scratch. The drawing engine ships as PaintKit, a UI-free Swift package with no dependencies that supports macOS 12 and iOS 15 and later.

swaggo / swag

Automatically generate RESTful API documentation with Swagger 2.0 for Go.

hyperf / hyperf

🚀 A coroutine framework that focuses on hyperspeed and flexibility. Building microservice or middleware with ease.