Speedtest by Ookla - Measure your ISP's performance in a click
Ptable - Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search. Full descriptions from write-up sources.
Global Website Speed Test - Test website load speed from 18 cities, including 3 in China
Periodic-table.io - Interactive periodic table of the chemical elements in 38 languages - Includes properties, history, name origin, facts, applications, hazards, isotopes and more
Meteor - Meteor is a set of new technologies for building top-quality web apps in a fraction of the time.
Kalzium - Kalzium (German for: Calcium) is a periodic table of the elements for KDE SC 4.