Mendeleiev is a periodic table and element information/list application for the DS.Included in the download is a .nds, .sc.nds and a .ds.gba version as well as the sourcecode.
btw i feel this a good time to remind you guys that sea of thieves was made by rare, who also made DKC1-3 and DK64, alongside banjo kazooie and conker's bad fur day