omegat

OmegaT is a free and open-source computer-assisted translation (CAT) tool designed to assist translators. Written in Java, it runs on Windows, macOS, and Linux, and is distributed under the GNU General Public License. OmegaT does not aim to replace human translation but to enhance consistency and productivity by managing translation memories and terminology.

Core features include a translation memory system that stores previously translated segments in TMX format, support for multiple translation memories within a single project, and fuzzy matching and concordance search to help reuse existing translations. It also supports glossaries and termbases to ensure consistent terminology across projects. OmegaT provides a project-oriented workflow: a single project directory contains the source files, translation memories, glossaries, and configuration.

OmegaT uses file filters to extract and reinsert text from a wide range of formats. Supported formats include plain text, HTML and XML, Java properties, OpenDocument formats, and many Microsoft Office formats through filters. It also supports Unicode and bidirectional languages, enabling use with non-Latin scripts.

The software is developed by a community of volunteers and is released under the GPL. It has an international user base and is used by individuals and organizations that prefer open-source CAT tools. OmegaT emphasizes portability and lightweight operation, making it suitable for contributors who need a cross-platform, extensible translation aid without reliance on proprietary software.