No Periodica - Periodic Table videos yet. You could help us improve this page by suggesting one.
Ptable - Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full descriptions from write-up sources.
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
Periodic-table.io - Interactive periodic table of the chemical elements in 38 languages - Includes properties, history, name origin, facts, applications, hazards, isotopes and more
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Kalzium - Kalzium (German for: Calcium) is a periodic table of the elements for KDE SC 4.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.