Quixey is a search engine for finding apps. You enter a search for what you are looking for. If you don’t know the keyword or description, just describe the problem and they will find the app to solve it.
This is a great tool for educators and students to use when looking for apps. You can search for any app by putting in your search options. The results are listed with the app logo, logos for what platforms it is available on, and a short description of the app. Click on the link and it opens up with a list of each platform, cost, link to the app, and user review ranking.