WeJustFoundOut is a website devoted to interesting things we just found out. We accept submissions from all-comers, but do not promise to publish them.
MathDL is an NSDL Pathway Project created and maintained by the Mathematical Association of America (MAA). It is a combination and extension of the previous MathDL, a collection within NSDL, and the earlier MAA Pathway Project, Math Gateway. It combines many features of the earlier two projects.