Gitea - A painless self-hosted Git service
Crowdin - Localize your product in a seamless way
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
POEditor - The translation and localization management platform that's easy to use *and* affordable!
GitBucket - GitBucket is the easily installable open-source GitHub clone written with Scala.
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.