Open source devtool projects
Every project in the registry tagged devtool, ranked by real GitHub adoption.
Feature flags for rapid, risk-free software deployment
Debug your apps, find hydration errors, trace your network and more in your react-router app with these devtools
Flamingock brings Change-as-Code (CaC) to your entire stack. It applies versioned, auditable changes to the external systems your application depends on — such
Frequently asked questions
How many open source devtool projects are there?
This registry tracks 3 projects tagged devtool, with 15,800 GitHub stars between them. The most-adopted is Unleash at 14,325 stars.
Are these devtool projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 3 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which devtool project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these devtool projects still maintained?
2 of the 3 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.