Wikids - An encyclopedia that talks to your kids
Learney - Knowledge aggregator for developers
COOLPHABETS - Helping kids around the world learn their native alphabets.
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.
WonderBox - Wikipedia for kids — Learn with friends and family
NumWorks - The graphing calculator that makes learning math easier.