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Open Source

May The Source Be With You! Articles about Open Source and Free Software as a philosophy, and its application to software development and project management.

submission guidelines

UPDATED APRIL 8, 2020

To keep this tag clean and meaningful, please ensure your post fits into at least one of the following categories:

Organizing, managing, running, or working in an Open Source project.
Open Source philosophy, licensing, and/or practical and legal topics thereof.
Advocacy and adoption of Open Source philosophy.

DO NOT use this tag if you are simply using technologies which happen to be open source.

You should NOT use this tag for any of the following:

Promoting open source projects, such as feature lists or announcements. (Use #news or Listings.)
Contributor requests. (Use #contributorswanted or Listings.)
Tutorials/articles that happen to use an open source tool. (Use appropriate technology tags.)
Showing off something you've built that happens to be open source. (Use the #showdev tag.)
Sharing lists of open source projects. (Use #githunt or the appropriate technology tags.)

Projects must comply with the Open Source Definition (see below) to legally use the term "open source".

As all "Free Software" officially complies with the standards of Open Source anyway, this tag covers both (collectively, FOSS).

about #opensource

Open Source is so much more than "you can read the code". It is formally defined by the Open Source Initiative.

"Open Source" should not be confused with the similar Free Software, which is defined by the Free Software Foundation. Generally, all Free Software is also Open Source, and the two camps often cooperate; however, the concepts are distinct! (The tags are merged here on DEV.to for simplicity, however.)

Open Source Hardware is defined and overseen by the Open Source Hardware Assocation

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Reymart A. Calicdan

May 6

PHP Fibers and the Future of MySQL Drivers

#php #mysql #opensource

3 min read

Ilia Alshanetsky

May 6

mdparser: a native CommonMark + GFM parser for PHP

#showdev #php #markdown #opensource

4 min read

Can Bilmez

May 11

I Built Tautest: A Mutation Testing Workflow for AI-Written Tests

#testing #opensource #ai #javascript

4 min read

May 6

I wrote a 104-page book on the GitHub signals that predict Series A rounds — free download

#venturecapital #github #opensource #datascience

2 min read

May 6

How I Built a Screenshot API That Doesn't Suck

#webdev #playwright #api #opensource

3 min read

May 6

Headless Claude, Done Right: Slice-Level Retrieval and the Subscription Trap

#ai #clau #mcp #opensource

7 min read

Abhishek

May 6

Loop-Watchdog

#ai #opensource #python #automation

1 min read

Dwayne McDaniel for GitGuardian

May 6

No Off Season: Three Supply Chain Campaigns Hit npm, PyPI, and Docker Hub in 48 Hours

#security #cybersecurity #opensource #devops

3 min read

Lior Cohen

May 6

Why I stopped using monthly caps and built preflight billing for my AI agent

#ai #python #agents #opensource

2 min read

KingGyu

May 6

I open-sourced Codex Spark: traceable UI delegation for Codex

#openai #opensource #ai #tooling

2 min read

May 7

JS Sandbox v1.0.0 — free open source desktop JavaScript scratchpad for Linux/Windows/Mac

#opensource #javascript

1 min read

paolomonasterolo

May 6

I built a CLI to audit Anthropic API spend. Here's what it detects.

#python #opensource #ai #devtools

5 min read

Konstantin

May 6

How I built subdomain-based multi-tenancy with Next.js 14, Supabase RLS, and Cloudflare — for free

#nextjs #supabase #opensource #webdev

4 min read

Shashank Kumar Singh

May 6

I built a free AI that reads my screen and answers out loud – no API key, runs offline with Ollama

#showdev #ai #opensource #python

2 min read

May 6

Apache Data Lakehouse Weekly: April 30–May 6, 2026

#news #data #dataengineering #opensource

9 min read

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