Weblate - securityinabox.org
Web-based continuous localization
Weblate is a web-based translation tool with tight version control integration. It features a simple and clean user interface, propagation of translations across components, quality checks and automatic linking to source files.
More information about Weblate can be found on weblate.org.
Weblate is libre software created by volunteers, and accepts donations.
By registering you agree to use your name and e-mail in version control system commits and provide your contribution under license defined by each translated project.