What's the difference between "open source" and "source-available" here?

Open source means an OSI-approved license — MIT, Apache 2.0, GPL, and similar — so you can run, modify, and redistribute it freely. Source-available means the code is visible but under a license, like BSL or a custom "fair source" license, that restricts commercial use or redistribution. We label each listing with which one it actually is, since the distinction has real licensing consequences.

Is "open source" the same as "free"?

Not necessarily. The license is free to use in the sense that you can self-host at no licensing cost, but most projects here also sell a hosted or managed version, and self-hosting has its own real cost in infrastructure and maintenance time. Check each listing for what's actually free versus what's the paid tier.

How do you judge whether a project is actively maintained versus abandoned?

Recent commit activity, release cadence, and issue response time — not star count. A project with a large star count from years ago can be effectively dead, while a smaller, newer one might be actively maintained. Verify directly on the project's repository before depending on it.

Open Source Project Management & Knowledge

Compare Open Source products across curated subcategories and trusted providers

180 products · 4 subcategoriesOpen Source resources

Showing 13–24 of 180

Active filtersOpen source Clear all

Business Time

by David Bock

Support for doing time math in business hours and days

Time TrackingTime TrackingOpen Source

Butterfly

by Alibaba

Butterfly，A JavaScript/React/Vue2 Diagramming library which concentrate on flow layout field. (基于JavaScript/React/Vue2的流程图组件)

Diagramming & Visual ModelingDiagram & Architecture ToolsOpen Source

CMS Pico

by Nextcloud

🗃 Integrate Pico CMS and let your users manage their own websites

Wiki ManagementWiki & Knowledge BasesOpen Source

Cascii Core

by Caspar Wylie

A web-based ASCII and Unicode diagram builder written in vanilla Javascript

Diagramming & Visual ModelingDiagram & Architecture ToolsOpen Source

Cask

by Cask

Project management tool for Emacs

Project ManagementProject TrackingOpen Source

Cfn Diagram

by Lars Jacobsson

CLI tool to visualise CloudFormation, SAM or CDK stacks as draw.io, visjs networks, ascii-art or mermaid

Diagramming & Visual ModelingDiagram & Architecture ToolsOpen Source

ChameleonMini

by Chair for Embedded Security

ChameleonMini is a portable tool for NFC security analysis and contactless card emulation.

Wiki ManagementWiki & Knowledge BasesOpen Source

Claude Canvas

by Agrici.Daniel

AI-orchestrated visual production for Obsidian Canvas. Create presentations, flowcharts, mood boards, knowledge graphs, and galleries with intelligent layout and AI-generated content.

Knowledge ManagementWiki & Knowledge BasesOpen Source

Collectives

by Nextcloud

Your space to collaboratively write and organize. Collectives is designed for groups and communities to structure shared knowledge and cultivate trust.

Wiki ManagementWiki & Knowledge BasesOpen Source

Computational-geometry

by Erik Nordeus

Computational Geometry Unity library with implementations of intersection algorithms, triangulations like delaunay, voronoi diagrams, polygon clipping, bezier curves, ear clipping, convex hulls, mesh simplification, etc

Diagramming & Visual ModelingDiagram & Architecture ToolsOpen Source