Periodic table and history atlas
“ The Periodic Spiral is the most comprehensive periodic table in its coverage of the elements and their interplay, and most efficient in enabling the user to access myriad informational categories with the click of a mouse.”
“ History Atlas is an open-source application for reading and writing history, has two components, Browser and Scribe. Users may toggle between the two components by single-clicking the words Browser or Scribe at the left side of the application window.”