OSI-licensed open source
Open-source developer tools cover the core of the software lifecycle: version control, editors, code hosting, CI/CD, containers, infrastructure as code and observability. Choosing open source means you can inspect the code, self-host, avoid lock-in and often run the same tool locally and in production.
This list picks eight widely used projects, one or two per stage of the workflow, and verifies the licence on each repository as of 2026-11-07. Note that licences vary: Git is GPL-2.0, Grafana is AGPL-3.0, OpenTofu is MPL-2.0 and the rest are permissive MIT or Apache-2.0 or dual-licensed, which affects how you can embed or redistribute them.
Tools, licences and pricing checked against vendor and repository pages on November 7, 2026.
| Tool | Best for | Pricing | Licence |
|---|---|---|---|
| Git | Every team as the version control foundation | Free, open source | GPL-2.0 |
| Visual Studio Code (Code - OSS) | General-purpose coding with a large extension marketplace | Free to use; source under MIT | MIT |
| Gitea | Teams wanting lightweight self-hosted Git hosting | Free, open source (self-hosted); commercial hosting and support from vendor, see vendor pricing | MIT |
| Jenkins | Teams needing a flexible self-hosted CI/CD server | Free, open source (self-hosted) | MIT |
| Neovim | Keyboard-driven editing and terminal-centric workflows | Free, open source | Apache-2.0 |
| OpenTofu | Infrastructure as code with an open governance model | Free, open source | MPL-2.0 |
| Moby | Teams building container-based systems and tooling | Free, open source | Apache-2.0 |
| Grafana | Observability dashboards and alerting | Free, open source (self-hosted); Grafana Cloud Free, Pro from $19/month plus usage, Enterprise from $25,000/year commit | AGPL-3.0 |
Best for: Every team as the version control foundation · Free, open source
Git is a fast, scalable, distributed revision control system with a rich command set that provides both high-level operations and full access to internals. It is the base layer for most modern code hosting and CI tools.
Best for: General-purpose coding with a large extension marketplace · Free to use; source under MIT
The Code - OSS repository is where Microsoft develops Visual Studio Code with the community. The source is MIT licensed, while the branded Microsoft VS Code download is distributed under a separate product licence.
Best for: Teams wanting lightweight self-hosted Git hosting · Free, open source (self-hosted); commercial hosting and support from vendor, see vendor pricing
Gitea aims to be the easiest, fastest and most painless way to set up a self-hosted all-in-one software development service, covering Git hosting, code review, issue tracking, project kanban, wiki, package registry and CI/CD.
Best for: Teams needing a flexible self-hosted CI/CD server · Free, open source (self-hosted)
Jenkins is the leading open-source automation server, built with Java. It provides hundreds of plugins to support building, deploying and automating projects.
Best for: Keyboard-driven editing and terminal-centric workflows · Free, open source
Neovim is a project that refactors Vim to simplify maintenance, enable advanced UIs without core modifications and maximise extensibility, with Lua scripting and a plugin ecosystem.
Best for: Infrastructure as code with an open governance model · Free, open source
OpenTofu is an open-source tool for building, changing and versioning infrastructure safely and efficiently. It manages existing popular service providers as well as custom in-house solutions.
Best for: Teams building container-based systems and tooling · Free, open source
Moby is an open-source project created by Docker to enable and accelerate software containerization. It provides a toolkit of components and a framework for assembling container-based systems; it underlies the Docker Engine.
Best for: Observability dashboards and alerting · Free, open source (self-hosted); Grafana Cloud Free, Pro from $19/month plus usage, Enterprise from $25,000/year commit
Grafana is the open-source platform for monitoring and observability, letting you query, visualise and alert on metrics wherever they are stored.
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| If you need… | Start with |
|---|---|
| Version control basics | Git |
| Self-hosted code hosting with CI | Gitea, Jenkins |
| Editing in the terminal or an IDE | Neovim, Visual Studio Code (Code - OSS) |
| Infrastructure as code | OpenTofu |
| Containers and observability | Moby, Grafana |
Quick answers to common questions
A tool whose source is released under an OSI-approved licence. Each tool here has a licence verified on its repository.
The Code - OSS repository is MIT licensed. The Microsoft VS Code binary you download is distributed under a separate product licence.
Terraform moved to the Business Source Licence, which is not OSI open source. OpenTofu, licensed MPL-2.0, is the open-source option listed here.
AGPL (Grafana) and GPL (Git) have copyleft terms that matter if you modify and distribute or offer the software as a network service. MIT and Apache-2.0 are permissive.
List it on TechLogHub and we'll review it for this guide.
