thi.ng is an open source collection of 20+ computational design tools for Clojure & Clojurescript: generative design, data visualization, digital fabrication, linked data, graph processing and more...
swMATH not only provides access to an extensive database of information on mathematical software, but also includes a systematic linking of software packages with relevant mathematical publications.
What will future historians will see as the major Russian contribution to early 21st-century Internet culture? It might not be troll farms and other strategies for poisoning public conversation — but rather, the democratization of access to scientific and scholarly knowledge.