● Mathematics Genealogy Project :The intent of this project is to compile information about ALL the mathematicians of the world.

● Fields Medallists :This site contains the official list of all Fields Medallists.

● QuickMath: QuickMath is a free online calculator that solves equations and many types of algebra and calculus problems.

● MacTutor History of Mathematics Archive: Created and maintained by Edmund Robertson and John O’Connor of the University of St. Andrews. 

● MIT Open Courseware: “MIT OpenCourseWare (OCW) is a web-based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity.” 

● arXiv: “arXiv is a free distribution service and an open-access archive for scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics.”