PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.

Glosbe - Huge collaborative massively multilingual dictionary.

Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.

Visuwords - The fun and free way to look up definitions. THE graphical dictionary and visual thesaurus.

Clever - syncing between education applications for K-12 schools

Wordnik - the biggest online English dictionary, by number of words