Thanks to a number of people and companies that have authorized us to use their work:

• The logo of our Spelling Application is from ArtsyBee. Images were edited with Lunapic
• The white chalk on black board font is from Marta van Eck
• Some of the code comes from contributions under the MIT license from stack overflow
• We are whitelisting the words used in our application with the dictionary from Dr P. Feldman 
• Our favicons are generated by RealFaviconGenerator.net
• We used OpenClipart as a source for an other application in development (license here)
• The logo of our new application is provided by FreeIconsPng