These are some good language arts/English apps.
Website: http://www.wordle.net/
Website: https://quizlet.com/
Edmodo app: http://www.edmodo.com/publisher?uid=507204
Free iPhone app: https://itunes.apple.com/us/app/quizlet/id546473125?mt=8&uo=4&at=10l6SU
Google Chrome app: https://chrome.google.com/webstore/detail/quizlet/bgofflgeghkhocbociocnckocbjmomjh
Website: http://www.instagrok.com/
Free iPad app: https://itunes.apple.com/us/app/instagrok/id777873941?mt=8&uo=4&at=10l6SU
Google Apps for Education app: https://www.google.com/enterprise/marketplace/viewListing?productListingId=17789+13349884249762973052
Google Chrome app: https://chrome.google.com/webstore/detail/instagrok/flonaffkffjppejcafgpdgilebfikemd
Edmodo app: http://www.edmodo.com/publisher?uid=7493337
Website: http://www.discoveryeducation.com/
Website: https://storybird.com/
Website: http://www.easybib.com/
Free iPhone app: http://itunes.apple.com/us/app/easybib/id436768184?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.easybib.easybibandroid
Google Apps for Education app: https://www.google.com/enterprise/marketplace/viewListing?productListingId=6357+7423325443125160988
Google Chrome app: https://chrome.google.com/webstore/detail/cbpiiblghhnlalifiaddecedaeaijdpe
Website: http://www.spellingcity.com/
Edmodo app: http://www.edmodo.com/publisher/vocabularyspellingcity
Free iPhone app: https://itunes.apple.com/us/app/spellingcity/id538407602?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/spellingcity/id538407602?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/grammar-app/id377188655?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/grammar-app/id377188655?mt=8&uo=4&at=10l6SU
Website: http://freerice.com/
Website: http://dictionary.com
Google Chrome app: https://chrome.google.com/webstore/detail/dictionary-by-dictionaryc/gikhgcaliglmioibbockkmjknfnepbdh
Website: http://www.pbs.org/teachers
Free iPhone app: http://itunes.apple.com/us/app/miss-spells-class/id308754739?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/fluencyfinder/id537046445?ls=1&mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/fluencyfinder/id537046445?ls=1&mt=8&uo=4&at=10l6SU
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.LGG.FluencyFinder
Free iPad app: https://itunes.apple.com/us/app/shake-phrase-fun-words-sentences/id436414534?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/shake-phrase-fun-words-sentences/id436414534?mt=8&uo=4&at=10l6SU
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.artgig.shakeaphrase
Paid iPad app: http://itunes.apple.com/us/app/spelling-hero-custom-spelling/id458589126?ls=1&mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/spelling-hero-custom-spelling/id458589126?ls=1&mt=8&uo=4&at=10l6SU
Website: http://noodletools.com/
Website: http://www.dpbolvw.net/click-6289941-10952832
Website: http://busyteacher.org/
Paid iPad app: https://itunes.apple.com/us/app/word-wizard-talking-movable/id447312716?ls=1&mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/word-wizard-talking-movable/id447312716?ls=1&mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/mad-libs/id326885152?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/mad-libs/id326885152?mt=8&uo=4&at=10l6SU