Abakcus.com is described as “the best curation site for only math and science. We do the hard job and curate the best articles, books, tools, products, videos, and projects.” Abakcus is a project by math blogger Ali who interestingly puts their vision as:
“We believe that learning new things is crucial for happiness. Since Abakcus is the collection of perfect sources about mathematics and science, I think we can make tons of people happy.”
Check out their website here.