Discover 5 High‑Star Open‑Source Tools: Scheduler, Diagrammer, Terminal Postman, AI Social Media, Visual Ping

01 QingLong – Powerful Open‑Source Scheduler (17.7K stars)

QingLong is a Node.js‑based task‑management platform that supports Python, JavaScript, Shell, and TypeScript scripts, allowing users to upload scripts, set execution times, and automatically run them while recording results for easy review.

Cross‑platform deployment (Docker, Linux server, panel tools like 1Panel)

Multi‑language support (Python, Node.js, Shell, TypeScript)

Cron‑style scheduling with flexible intervals

Real‑time log monitoring and detailed execution records

Rich API for programmatic task management

Online installation of Python/Node.js/Linux dependencies

Project URL: https://github.com/whyour/qinglong

02 Mermaid – Markdown‑Style Diagramming Tool (80.1K stars)

Mermaid is a JavaScript‑based charting library that lets users define diagrams using simple Markdown‑like syntax, generating flowcharts, sequence diagrams, Gantt charts, class diagrams, state diagrams, and more.

Seamless integration with Markdown documents

Text‑based definitions enable version control

Low learning curve with intuitive syntax

Supports a wide variety of diagram types

Live editor with real‑time preview, autocomplete, and syntax hints

Project URL: https://github.com/mermaid-js/mermaid

03 posting – Terminal‑Based Postman Alternative (9.1K stars)

posting is a Python application built with the Textual framework that brings the full API‑client experience into a terminal UI, offering keyboard‑driven shortcuts, YAML‑based request definitions, and extensive customization.

Keyboard‑first workflow with powerful shortcuts and command palette

Requests stored as readable YAML files for version control

cURL import/export with automatic parsing

Intelligent autocomplete for headers, variables, and bodies

Integration with external editors (nvim, VS Code) and JSON viewers (fx)

Global command panel for quick actions

Jump‑mode navigation for rapid UI traversal

Customizable key bindings and theme system

Environment and variable management with hot‑reload

Pre‑ and post‑request hooks allowing Python scripts for dynamic processing

Project URL: https://github.com/darrenburns/posting

04 Postiz – AI‑Powered Social Media Management Suite (21.6K stars)

Postiz is an all‑in‑one open‑source platform built with modern stacks (NX, Next.js, Nest.js, Prisma) that consolidates scheduling, analytics, and collaboration for over ten overseas social platforms, featuring AI‑generated multilingual copy, smart image creation, and automated engagement incentives.

Cross‑platform scheduling and multi‑channel posting

AI assistant for content ideation, rewriting, and image generation

Built‑in visual design tool similar to Canva

Team collaboration with shared accounts, comments, and task assignments

Automated interaction triggers based on milestones (likes, comments)

Comprehensive analytics dashboard covering all supported platforms

Extensive channel support: X, Facebook, Instagram, LinkedIn, TikTok, YouTube, Reddit, Pinterest, etc.

Open‑source project: https://github.com/gitroomhq/postiz-app

05 Nping – Visual, Multi‑Address Ping Tool (1.8K stars)

Nping is a Rust‑implemented open‑source ping utility that extends traditional ping by allowing concurrent probing of multiple addresses and presenting results as line charts, scatter plots, or tables, while tracking latency, packet loss, and other key metrics.

Concurrent probing of multiple IPs/domains

Real‑time visualizations: line chart, scatter plot, table view

Full metric set: max/min/average latency, packet loss, IPv4/IPv6 support

Customizable parameters: probe count, interval, thread count

Lightweight binary (~2 MB)

Project URL: https://github.com/hanshuaikang/Nping