Best Open Source Tools by Tag in 2026

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Open Source Alternatives

Simdjson

stars 24.4Kforks 1.3K

Parse gigabytes of JSON per second with SIMD instructions

Developer Tools Data Visualization

3x Ui

stars 47.8Kforks 12.3K

Web panel for Xray-core with per-client and multi-node controls

Developer Tools Server Management Self Hosted

Flutter

stars 179.5Kforks 33.6K

One codebase for mobile, web, and desktop. Native performance.

Developer Tools UI/UX Design

Herdr

stars 43.3Kforks 3.4K

Agent runtime that keeps terminals alive across machines

Developer Tools AI Agents Self Hosted+1

Superfile

stars 23.8Kforks 877

Terminal file manager with multi-panel layout and 20+ themes

Developer Tools

Vorssaint Utils

stars 25.9Kforks 1.1K

One menu bar icon replacing a dozen paid macOS apps

Developer Tools Workflow Automation

Xray-core

stars 42Kforks 6K

Open source proxy core with XTLS, VLESS, and REALITY protocols

Cloud Native DevOps Tools Security+1

Lyrimuse

stars 219forks 9

Word-by-word lyrics for Mac, nine players, Last.fm built in

Developer Tools

Athena-Public

stars 600forks 79

Persistent memory for your AI across IDEs

Knowledge Management Developer Tools AI Agents+1

CodeBoarding

stars 2.5Kforks 208

Review code changes as architecture maps, not line diffs

Developer Tools LLMOps Data Visualization+1

Artcraft

stars 14.5Kforks 2.3K

Open source AI studio for artists who want real control

AI Coding Assistant 3D Modeling Graphic Design+2

Vela

stars 1.8Kforks 83

OpenStreetMap and Google data, no account, no Play Services

Privacy Tools Open Core Developer Tools

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