The best open source alternative to Felix CAT is Poedit. If that doesn't suit you, our users have ranked more than 10 alternatives to Felix CAT and seven of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Felix CAT are Lokalize, OmegaT, Gtranslator and LF Aligner.
Poedit is cross-platform gettext catalogs (.po files) editor. It is built with wxWidgets toolkit and can run on any platform supported by it (although it was only tested on Unix with GTK+ and Windows). It aims to provide more convenient approach to editing catalogs than...
Lokalize is the localization tool for KDE software and other free and open source software. It is also a general computer-aided translation system (CAT) with which you can translate OpenDocument files (*.odt).
OmegaT is a free translation memory application written in Java. It is a tool intended for professional translators. It does not translate for you!
GNOME Translation Editor (Formerly known as Gtranslator) is an enhanced gettext po file editor for the GNOME desktop environment. It handles all forms of gettext po files and includes features such as Find/Replace, Translation Memory, different Translator Profiles, Messages...
LF Aligner helps translators create translation memories from texts and their translations. It relies on Hunalign for automatic sentence pairing. Input: txt, doc, docx, rtf, pdf, html. Output: tab delimited txt, TMX and xls. With web features.
Innovative: Natural-sounding translations with genders and grammatical cases when necessary. Locale-specific logic doesn't leak to other locales.
React Intl Editor is an open-source editor for translation files generated by react-intl-translations-manager.
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