created: 2026-04-24 updated: 2026-04-24 tags: [source, github, cat-tool, translation] type: source url: https://github.com/omegat-org/omegat author: "Omegat Org" (40 contributors) published: ~2000-ongoing

OmegaT GitHub Repository¶

Summary¶

The official OmegaT development repository on GitHub — a free, open-source, multiplatform Computer Assisted Translation (CAT) tool with fuzzy matching, translation memory, keyword search, glossaries, and translation leveraging into updated projects.

Key Takeaways¶

Project Stats¶

Stars: 512 | Forks: 128 | Contributors: 40
Primary language: Java (93.2%), HTML (2.9%), Groovy (1.7%), XSLT (0.7%)
License: GPL v3
Topics: translation, localization, l10n, t8n, gplv3
Created: 2015-11-06 (original work dates back to ~2000 by Keith Godfrey)
Last activity: April 2026 (actively maintained)

Repository Structure¶

Directory	Purpose
`src/`	Core OmegaT application source code
`aligner/`	Translation memory alignment module
`machinetranslators/`	Machine translation integrations (Google, DeepL, Azure, etc.)
`language-modules/`	Language-specific modules for segmentation, tokenization
`spellchecker/`	Spell checking module
`theme/`	UI theming support
`firsttime-wizard/`	First-run onboarding wizard
`tipoftheday/`	Tip-of-the-day feature
`build-logic/`	Custom Gradle build logic
`ci/`	Continuous integration configuration
`test/`, `test-integration/`, `test-acceptance/`	Test suites at multiple levels
`src_docs/`	Source documentation
`config/`	Build configuration (checkstyle, etc.)

Build System¶

Gradle multi-project build with concurrent compilation across subprojects
Requires JDK 11+ (compatible with Java 8+ runtime)
gradlew run, runOnJava17, runOnJava21 for quick dev cycles
installDist for full distribution assembly
Containerized builds for installers (InnoSetup, Mac signing)

Key Contributors¶

Keith Godfrey — Original author
Jean-Christophe Helary — Project manager
Hiroshi Miura — Lead developer
Briac Pilpré — Webmaster
Kos Ivantsov — Localisation manager
Philippe Tourigny — Documentation manager

Plugins Ecosystem¶

omegat-plugins — Certified plugins database (Kotlin)
plugin-skeleton — Plugin development skeleton with Gradle
deepl-connector-plugin — DeepL V2 API connector
azure-translate-plugin — Microsoft Azure Translate V3 plugin