OPWebsite · open.eduOpenLearnShort university coursesCompletely freeNo account neededWorks on mobileDetailsVisit website
ПОWebsite · postnauka.orgПостНаукаScientific discoveries first handPricing not specifiedAvailable in RussianNo account neededDetailsVisit website
KAWebsite · khanacademy.orgKhan AcademyMath and science in clear lessonsFree plan availableWorks on mobileDetailsVisit website
EEWebsite · explorabl.esExplorable ExplanationsComplex ideas through play and experimentsPricing not specifiedNo account neededDetailsVisit website
ARWebsite · arzamas.academyArzamasArt and history through lecturesFree plan availableAvailable in RussianNo account neededWorks on mobileDetailsVisit website