Open source jvm projects
Every project in the registry tagged jvm, ranked by real GitHub adoption.
Production-safe dynamic tracing and diagnostics for Java applications—attach to live JVMs with no restart or recompilation.
Apache Log4j is a versatile, feature-rich, efficient logging API and backend for Java.
Lightweight Multiplatform logging framework for Kotlin. A convenient and performant logging facade.
Frequently asked questions
How many open source jvm projects are there?
This registry tracks 3 projects tagged jvm, with 12,740 GitHub stars between them. The most-adopted is btrace at 5,994 stars.
Are these jvm projects free to use?
Yes — 3 of the 3 carry an explicit open-source licence across 1 distinct licence, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which jvm 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 jvm 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.