Great for ESL.
Website: http://duolingo.com/
Google Chrome app: https://chrome.google.com/webstore/detail/duolingo/aiahmijlpehemcpleichkcokhegllfjl
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: https://twitter.com/
Free iPad app: https://itunes.apple.com/us/app/id333903271?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/id333903271?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.twitter.android
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.twitter.android
Free Mac program: https://itunes.apple.com/us/app/twitter/id409789998?mt=12&uo=4&at=10l6SU
Website: http://freerice.com/
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
Website: http://thesaurus.com/
Google Chrome app: https://chrome.google.com/webstore/detail/thesauruscom-synonyms-and/clljlcapeomdokpgadmegpabakieebci
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
Paid iPad app: https://itunes.apple.com/us/app/handwriting-without-tears/id548753732?mt=8&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/handwriting-without-tears-wet-dry-try-for-capitals/id623327604?mt=8&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/spell-+-friends-by-tap-to-learn/id387159788?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/spell-+-friends-by-tap-to-learn/id387159788?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/dora-abcs-vol-1-letters-letter/id405566203?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/dora-abcs-vol-1-letters-letter/id405566203?mt=8&uo=4&at=10l6SU
Website: http://spanish.dictionary.com/
Google Chrome app: https://chrome.google.com/webstore/detail/dictionarycom-spanish/mjeoplfnbghcdcjmegbolhgikciockpo
Paid iPad app: https://itunes.apple.com/us/app/learners-dictionary-english/id522474516?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/learners-dictionary-english/id522468643?mt=8&uo=4&at=10l6SU
Website: http://www.learnersdictionary.com/
Website: https://lingua.ly/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.lingualy.lingualymobile
Free iPhone app: https://itunes.apple.com/us/app/lingua.ly-learn-language./id880933022?mt=8&at=10l6SU
Google Chrome app: https://chrome.google.com/webstore/detail/lingualy-practice-a-langu/iilcekgoelpgecpjnnoikhbleipnjdhf
Paid Mac program: https://www.wceps.org/Store/WIDAhttps://www.wceps.org/store/wida/ProductDetails?ProductID=78&CategoryID=1
Paid Windows program: https://www.wceps.org/store/wida/ProductDetails?ProductID=78&CategoryID=1
Website: http://www.rosettastone.com/
Paid Mac program: http://www.rosettastone.com/
Paid Windows program: http://www.rosettastone.com/
Paid iPhone app: http://itunes.apple.com/app/spanish-audio-flashcards/id302647535?mt=8&uo=4&at=10l6SU
Paid Windows program: http://sites.fastspring.com/declan/product/dsfc?reference=DEC120722-DYBX-8216-4433
Website: https://www.verbling.com/
Website: http://oxforddictionaries.com/
Paid iPad app: https://itunes.apple.com/us/app/learning-numbers-in-spanish/id369310598?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/conjugation-nation-spanish/id320530591?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/conjugation-nation-spanish/id320530591?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/gus-on-the-go-english/id541568936?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/gus-on-the-go-english/id541568936?mt=8&uo=4&at=10l6SU
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.toojuice.android.gus.english.usa
Paid iPad app: https://itunes.apple.com/us/app/infinity-crosswords/id590369667?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/little-pim-spanish/id447096019?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/globe-smart-education-1/id786463380?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/globe-smart-education-1/id786463380?mt=8&uo=4&at=10l6SU
Website: https://opgrades.com/
Website: https://subscription.oneglobekids.com/
Free iPad app: https://itunes.apple.com/us/app/one-globe-kids-childrens-stories/id477746969?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/one-globe-kids-childrens-stories/id477746969?mt=8
Website: http://www.abaenglish.com/
Paid iPad app: https://itunes.apple.com/us/app/first-words-spanish/id383147094?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/first-words-spanish/id383147094?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/spanish-first-words-phonics/id448733895?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/spanish-first-words-phonics/id448733895?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/gus-on-the-go-spanish/id541567964?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/gus-on-the-go-spanish/id541567964?mt=8&uo=4&at=10l6SU
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.toojuice.android.gus.spanish.mexico
Free Android Phone app: https://play.google.com/store/apps/details?id=com.memwalker.spanish
Free iPad app: https://itunes.apple.com/us/app/id385497068?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/id385497068?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/app/id578535453?mt=8&uo=4&at=10l6SU
Website: http://dynamo.dictionary.com/
Website: http://www.visualthesaurus.com/
Website: http://www.dpbolvw.net/click-6289941-10952832
Free iPad app: https://itunes.apple.com/us/app/sight-words-by-photo-touch/id421341850?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/sight-words-by-photo-touch/id421341850?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/id481067676?mt=8&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/id435476174?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/id481067676?mt=8&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/id435476174?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.letterschool.lite
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.letterschool
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.letterschool.lite
Paid Android Tablet app: https://play.google.com/store/apps/details?id=com.letterschool
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://kaizena.com/
Free iPad app: https://itunes.apple.com/us/app/kaizena-fast-personal-feedback/id1025198506?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/kaizena-fast-personal-feedback/id1025198506?mt=8&at=10l6SU
Website: http://www.languageguide.org/
Website: http://www.starfall.com/
Free iPad app: https://itunes.apple.com/us/app/rocket-speller/id492504689?ls=1&mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/rocket-speller-plus/id583255132?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/rocket-speller/id492504689?ls=1&mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/rocket-speller-plus/id583255132?mt=8&uo=4&at=10l6SU
Website: http://rewordify.com/
Paid iPad app: http://itunes.apple.com/us/app/vocab-a-splat/id517271626?ls=1&mt=8&uo=4&at=10l6SU
Website: http://www.hemingwayapp.com/
Paid Mac program: https://gum.co/NlhpD
Paid Windows program: https://gum.co/QrXz
Website: http://www.sewardreadingresources.com/wls.html
Paid iPad app: http://itunes.apple.com/us/app/id515121228?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/id515121228?mt=8&uo=4&at=10l6SU
Website: http://www.grammaropolis.com/
Paid iPhone app: https://itunes.apple.com/us/app/grammaropolis-complete-edition/id580476057?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/grammaropolis-complete-edition/id580476057?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/grammaropolis/id559851814?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/grammaropolis/id559851814?mt=8&uo=4&at=10l6SU
Website: http://voxy.com/
Free iPhone app: https://itunes.apple.com/us/app/aprende-ingles-voxy/id411535459?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.voxy.news