Sites and apps similar to WebElements include Atomic - Periodic Table, which is open source with a free version. Other options are Periodic Table, Periodica - Periodic Table, Kalzium and Ptable. You can choose from more than 10 sites and apps like WebElements for Android, iPhone, Windows, Linux and iPad.
Nucleus gives you the ability to view the periodic table of the elements, as well as a variety of properties for each element, some with a visual representation. There is also search functionality which gives you the elements in a list for efficient viewing.
Talbica is a set of Chemistry tools: Periodic table, Compounds database and Reactions reference.
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Molar is an educational tool and reference for students with features such as a periodic table, triangle solver and chemical equation balancer. It is mainly a digital periodic table, very useful for students.
