This is a collection of apps that can work on both the iPad and Google Chromebook.
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://www.google.com/
Free iPad app: https://itunes.apple.com/us/app/google-search/id284815942?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/google-search/id284815942?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.googlequicksearchbox
Google Chrome app: https://chrome.google.com/webstore/detail/google-search/coobgpohoikkiipiblmjeljniedjpjpf
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.apps.docs
Google Chrome app: https://chrome.google.com/webstore/detail/google-drive/apdfllckaahabafndbhieahigkjlhalf
Free iPad app: https://itunes.apple.com/us/app/google-drive/id507874739?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/google-drive/id507874739?mt=8&uo=4&at=10l6SU
Website: http://drive.google.com/
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.google.android.apps.docs
Free Mac program: https://www.google.com/drive/download/
Free Windows program: https://www.google.com/drive/download/
Free iPad app: https://itunes.apple.com/us/app/google-earth/id293622097?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/google-earth/id293622097?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.earth
Free Mac program: http://www.google.com/earth/download/
Free Windows program: http://www.google.com/earth/download/
Google Chrome app: http://www.google.com/earth/explore/products/plugin.html
Mozilla Firefox extension: http://www.google.com/earth/explore/products/plugin.html
Apple Safari extension: http://www.google.com/earth/explore/products/plugin.html
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.apps.plus
Google Chrome app: https://chrome.google.com/webstore/detail/google%20/dlppkpafhbajpcmmoheippocdidnckmm
Free iPad app: https://itunes.apple.com/us/app/google+/id447119634?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/google+/id447119634?mt=8&uo=4&at=10l6SU
Website: http://plus.google.com/
Website: http://books.google.com/
Google Chrome app: https://chrome.google.com/webstore/detail/google-play-books/mmimngoggfoobjdlefbcabngfnmieonb
Free Android Phone app: https://play.google.com/store/apps/details?id=com.google.android.apps.translate
Google Chrome app: https://chrome.google.com/webstore/detail/google-translate/aapbdbdomjkkjkaonfhkkikfgjllcleb
Free iPad app: http://itunes.apple.com/us/app/google-translate/id414706506?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/google-translate/id414706506?mt=8&uo=4&at=10l6SU
Website: http://translate.google.com/
Free iPhone app: https://itunes.apple.com/us/app/chrome/id535886823?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/chrome/id535886823?mt=8&uo=4&at=10l6SU
Free Mac program: http://www.google.com/chrome/
Free Windows program: http://www.google.com/chrome/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.android.chrome
Free Android Phone app: https://play.google.com/store/apps/details?id=com.fusionprojects.edmodo
Free iPad app: http://itunes.apple.com/us/app/edmodo/id378352300?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/edmodo/id378352300?mt=8&uo=4&at=10l6SU
Website: http://www.edmodo.com/
Google Chrome app: https://chrome.google.com/webstore/detail/edmodo/fpcdidgjjebefhmlhjlgnkahlimgaemc
Free iPad app: https://itunes.apple.com/us/app/subtext/id457556753?mt=8&ign-mpt=uo%3D4&uo=4&at=10l6SU
Edmodo app: http://www.edmodo.com/publisher/subtext
Free Android Phone app: https://play.google.com/store/apps/details?id=com.socrative.teacher
Free iPad app: https://itunes.apple.com/us/app/teacher-clicker-socrative/id477620120?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/teacher-clicker-socrative/id477620120?mt=8&uo=4&at=10l6SU
Website: http://www.socrative.com/
Edmodo app: http://www.edmodo.com/publisher/socrative
Google Chrome app: https://chrome.google.com/webstore/detail/socrative-teacher/ofajgnplnindhnhnconjocimijjifaln?hl=en
Free Android Phone app: https://market.android.com/details?id=com.evernote.skitch
Free iPad app: http://itunes.apple.com/app/skitch-for-ipad/id490505997?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/app/skitch-for-ipad/id490505997?mt=8&uo=4&at=10l6SU
Free Mac program: http://itunes.apple.com/app/skitch/id425955336?mt=12&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.pinterest
Free iPad app: https://itunes.apple.com/us/app/pinterest/id429047995?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/pinterest/id429047995?mt=8&uo=4&at=10l6SU
Website: http://pinterest.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.skype.raider&hl=en
Free iPad app: http://itunes.apple.com/us/app/skype-for-ipad/id442012681?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/skype/id304878510?mt=8&uo=4&at=10l6SU
Free Mac program: http://www.skype.com/go/download
Free Windows program: http://www.skype.com/go/download
Website: http://skype.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.socrative.student
Free iPad app: https://itunes.apple.com/app/student-clicker-socrative/id477618130?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/app/student-clicker-socrative/id477618130?mt=8&uo=4&at=10l6SU
Website: http://www.socrative.com/
Edmodo app: http://www.edmodo.com/publisher/socrative
Google Chrome app: https://chrome.google.com/webstore/detail/socrative-student/nblhpecglllndfihipmpdoikimcmgkha
Free Android Phone app: https://play.google.com/store/apps/details?id=com.evernote
Google Chrome app: https://chrome.google.com/webstore/detail/pioclpoplcdbaefihamjohnefbikjilc
Mozilla Firefox extension: https://addons.mozilla.org/en-US/firefox/addon/evernote-web-clipper/
Free iPad app: http://itunes.apple.com/us/app/evernote/id281796108?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/evernote/id281796108?mt=8&uo=4&at=10l6SU
Free Mac program: http://itunes.apple.com/us/app/evernote/id406056744?mt=12&uo=4&at=10l6SU
Apple Safari extension: http://evernote.com/download/get.php?file=SafariExtension
Free Windows program: http://evernote.com/download/get.php?file=Win
Website: http://www.evernote.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.dropbox.android
Google Chrome app: https://chrome.google.com/webstore/detail/ioekoebejdcmnlefjiknokhhafglcjdl
Free iPad app: http://itunes.apple.com/us/app/dropbox/id327630330?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/dropbox/id327630330?mt=8&uo=4&at=10l6SU
Free Mac program: https://www.dropbox.com/downloading?os=mac
Free Windows program: https://www.dropbox.com/downloading?os=win
Website: https://db.tt/dUahryRn
Free iPad app: https://itunes.apple.com/us/app/pic-collage/id448639966?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/pic-collage/id448639966?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.cardinalblue.piccollage.google
Paid iPad app: http://itunes.apple.com/us/app/comicbook!/id436114747?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/comicbook!/id436114747?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.threedtopo.comicbook.android
Free Android Phone app: https://play.google.com/store/apps/details?id=com.schoology.app
Free iPad app: https://itunes.apple.com/us/app/schoology/id411766326?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/schoology/id411766326?mt=8&uo=4&at=10l6SU
Website: http://www.schoology.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=fm.audioboo.application
Free iPad app: http://itunes.apple.com/app/audioboo/id305204540?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/app/audioboo/id305204540?mt=8&uo=4&at=10l6SU
Website: http://audioboo.fm/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.linoit.lino
Free iPad app: https://itunes.apple.com/us/app/lino-online-stickies/id416718906?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/lino-online-stickies/id416718906?mt=8&uo=4&at=10l6SU
Website: http://en.linoit.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.studyblue
Free iPad app: http://itunes.apple.com/ie/app/studyblue/id323887414?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/ie/app/studyblue/id323887414?mt=8&uo=4&at=10l6SU
Website: http://www.studyblue.com/
Google Chrome app: https://chrome.google.com/webstore/detail/studyblue-inc/hiicppnmnhhkaaboclnefgkbnpkompmh
Website: http://www.scootpad.com/
Edmodo app: http://www.edmodo.com/publisher/scootpad
Google Chrome app: https://chrome.google.com/webstore/detail/scootpad/boihgpoojeingjbbdjmoocbdibophjap
Free Mac program: https://itunes.apple.com/us/app/scootpad/id493083432?ls=1&mt=12&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.scootpad.app
Free iPad app: https://itunes.apple.com/us/app/scootpad/id557056479?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.merriamwebster
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.merriamwebster.premium
Free iPad app: https://itunes.apple.com/us/app/merriam-webster-dictionary/id438477986?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/merriam-webster-dictionary/id478132032?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/merriam-webster-dictionary/id399452287?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/merriam-webster-dictionary/id478126577?mt=8&uo=4&at=10l6SU
Website: http://www.merriam-webster.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.overdrive.mobile.android.mediaconsole
Free iPad app: https://itunes.apple.com/us/app/overdrive-media-console-library/id366869252?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/overdrive-media-console-library/id366869252?mt=8&uo=4&at=10l6SU
Free Mac program: http://overdrive.com/software/omc/
Free Windows program: http://overdrive.com/software/omc/
Website: http://penzu.com
Google Chrome app: https://chrome.google.com/webstore/detail/penzu/khgpedpfmjojllfmmhfabemdelhncneo
Free Android Phone app: https://play.google.com/store/apps/details?id=com.penzu.android
Free iPhone app: https://itunes.apple.com/us/app/penzu/id452674732?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/penzu/id452674732?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.instapaper.android
Free iPad app: http://itunes.apple.com/us/app/instapaper/id288545208?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/instapaper/id288545208?mt=8&uo=4&at=10l6SU
Website: http://www.instapaper.com/
Website: http://teachercast.net/
Free iPad app: https://itunes.apple.com/us/app/teachercast-educational-broadcasting/id460774278?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/teachercast-educational-broadcasting/id460774278?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.teaminfoapp.custom.android.teachercastlibsyn
Free iPhone app: https://itunes.apple.com/us/app/nasa-app/id334325516?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/nasa-app/id334325516?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=gov.nasa
Paid iPad app: https://itunes.apple.com/au/app/flashcards-for-ipad/id378421781?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.inkids.android.flashcards
Free iPad app: https://itunes.apple.com/us/app/sketchbook-express-for-ipad/id410871280?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.adsk.sketchbookhdexpress
Free Mac program: https://itunes.apple.com/us/app/sketchbook-express/id404243625?mt=12&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.splashtop.remote.pad.v2
Free iPhone app: https://itunes.apple.com/us/app/splashtop-2-remote-desktop/id561386772?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/splashtop-2-remote-desktop/id382509315?mt=8&uo=4&at=10l6SU
Free Mac program: https://itunes.apple.com/us/app/splashtop-2-remote-desktop/id562828328?mt=12&uo=4&at=10l6SU
Free Windows program: http://apps.microsoft.com/windows/en-us/app/splashtop-2-remote-desktop-for/3523093b-4869-4076-8c93-c1629c74b861
Website: https://www.box.com/
Free iPad app: https://itunes.apple.com/us/app/box-for-iphone-and-ipad/id290853822?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/box-for-iphone-and-ipad/id290853822?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.box.android
Google Apps for Education app: https://www.google.com/enterprise/marketplace/viewListing?productListingId=3543+4657829137571541331
Free Windows program: http://apps.microsoft.com/windows/en-us/app/box/5183c685-a8ee-4b9e-b716-9509ebde9a52
Google Chrome app: https://chrome.google.com/webstore/detail/box-5-gb-free-storage/ejnkaeblpdcamcioiiabclakabcbjmbl