raylib - Cross-platform, open-source game development library in C.
Crowdin - Localize your product in a seamless way
SFML - SFML provides a simple interface to the various components of your PC, to ease the development of games and multimedia applications. It is composed of five modules: system, window, graphics, audio and network.
POEditor - The translation and localization management platform that's easy to use *and* affordable!
SDL - Simple DirectMedia Layer is a cross-platform multimedia library designed to provide low level...
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.