OpenGrok

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OpenGrok
Original author(s)	Sun Microsystems
Developer(s)	Oracle Corporation
Stable release	1.14.0[1] / 27 May 2025; 31 days ago (27 May 2025)
Repository	github.com/oracle/opengrok
Written in	Java
Operating system	Cross-platform
Type	Indexer and cross-referencer with Revision control
License	CDDL
Website	oracle.github.io/opengrok/

OpenGrok is a source code cross-reference and search engine. It helps programmers search, cross-reference, and navigate source code trees to aid program comprehension.

It can read program file formats and version control histories such as Monotone, Subversion, Mercurial, Git, ClearCase, Perforce, AccuRev, Razor, and Bazaar.^[2]

The name comes from the term grok, a computing jargon term meaning "intuitive understanding".

OpenGrok is being developed mainly by the community with the help of a few engineers from the Oracle Corporation. OpenGrok is released under the terms of the Common Development and Distribution License (CDDL).

It is mainly written in Java, with some tooling done in Python. It relies on the analysis done by Ctags. There is an official Docker image available.