Wikipedia - Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
Preschool - Preschool!
Miraheze - Miraheze is a wiki farm (hosts wikis) for free and with no ads, it also provides custom domains...
EduKittyABC - ABC Games for Kids – EduKittyABC is a fun tracing English alphabet educational app developed and published by Cubic Frog Apps.
Oppia - Oppia is a free, open-source learning platform.
Bini Super ABC - Bini Super ABC! Alphabet Games for Toddlers and Kids is a fun education app for those kids who want to learn letters and sounds of the whole alphabets.