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Ptable - Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full descriptions from write-up sources.
Crowdin - Localize your product in a seamless way
Periodic-table.io - Interactive periodic table of the chemical elements in 38 languages - Includes properties, history, name origin, facts, applications, hazards, isotopes and more
POEditor - The translation and localization management platform that's easy to use *and* affordable!
Kalzium - Kalzium (German for: Calcium) is a periodic table of the elements for KDE SC 4.
Lokalise - Localization tool for software developers. Web-based collaborative multi-platform editor, API/CLI, numerous plugins, iOS and Android SDK.