List of apps I think are good to create app smashes.
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/morfo/id418900007?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/morfo/id418900007?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/morfo-3d-face-booth/id440560166?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/morfo-3d-face-booth/id440560166?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/id431493086?mt=8&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/id431493086?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.explaineverything.explaineverything
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.explaineverything.explaineverything
Google Chrome app: https://chrome.google.com/webstore/detail/explain-everything/abgfnbfplmdnhfnonljpllnfcobfebag
Free iPad app: https://itunes.apple.com/us/app/haiku-deck/id536328724?mt=8&uo=4&at=10l6SU
Website: http://www.haikudeck.com/
Free iPad app: https://itunes.apple.com/us/app/word-clouds-by-abcya.com/id823682295?mt=8&uo=4&at=10l6SU
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/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
Website: http://www.thinglink.com/
Free iPad app: https://itunes.apple.com/us/app/thinglink/id647304300?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/thinglink/id647304300?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/creative-book-builder/id451041428?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/creative-book-builder/id451041428?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/strip-designer/id314780738?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/strip-designer/id314780738?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/stick-around-by-tony-vincent/id557949353?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/wordfoto/id414002091?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/wordfoto/id414002091?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/puppet-pals-2-all-access/id557616416?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/puppet-pals-2-all-access/id557616416?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/puppet-pals-2-free/id589141096?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/puppet-pals-2-free/id589141096?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/abc-magnetic-board-alphabet/id463212061?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/popplet/id374151636?mt=8&uo=4&at=10l6SU
Paid iPhone app: http://itunes.apple.com/us/app/popplet/id374151636?mt=8&uo=4&at=10l6SU
Website: http://popplet.com/
Free iPad app: http://itunes.apple.com/us/app/screenchomp/id442415881?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/adobe-voice-show-your-story/id852555131?mt=8&uo=4&at=10l6SU
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.nextwave.comicsheadlite
Paid iPad app: https://itunes.apple.com/us/app/comics-head-create-your-own/id480969185?mt=8&at=10l6SU
Paid Android Tablet app: https://play.google.com/store/apps/details?id=com.nextwave.comicsheadpro&hl=en
Paid Android Tablet app: https://play.google.com/store/apps/details?id=com.nextwave.comicsheadpro
Free iPad app: https://itunes.apple.com/us/app/speakingphoto/id485844944?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/speakingphoto/id485844944?mt=8&uo=4&at=10l6SU
Website: http://www.flambestudios.com/PicPlayPost.html
Paid iPad app: https://itunes.apple.com/us/app/path-on-swipe-to-type/id596696015?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/path-on-swipe-to-type/id596696015?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/retromatic-hd-2.0/id581731651?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/trading-cards/id555742821?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/kidspiration-maps-lite/id675831529?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/kidspiration-maps/id675321195?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/inspiration-maps-lite/id510031612?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/inspiration-maps/id510173686?ls=1&mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/inspiration-maps-lite/id510031612?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/inspiration-maps/id510173686?ls=1&mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/qrafter-qr-code-barcode-reader/id416098700?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/qrafter-qr-code-barcode-reader/id416098700?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/qrafter-pro-qr-code-barcode/id468610525?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/qrafter-pro-qr-code-barcode/id468610525?mt=8&uo=4&at=10l6SU
Free iPad app: http://itunes.apple.com/us/app/toontastic/id404693282?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/toontastic-all-access/id563403725?mt=8&uo=4&at=10l6SU
Paid iPad app: https://itunes.apple.com/us/app/story-dice/id525351988?mt=8&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/story-dice/id525351988?mt=8&at=10l6SU
Paid Android Phone app: https://play.google.com/store/apps/details?id=com.thinkamingo.storydice
Paid Android Tablet app: https://play.google.com/store/apps/details?id=com.thinkamingo.storydice
Paid iPad app: https://itunes.apple.com/us/app/shape-collage/id436917115?mt=8&uo=4&at=10l6SU
Paid iPhone app: https://itunes.apple.com/us/app/shape-collage/id436917115?mt=8&uo=4&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/chromville/id748017957?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/chromville/id748017957?mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.imascono.proyecto_dibujar
Paid iPad app: https://itunes.apple.com/us/app/green-screen-by-do-ink/id730091131?mt=8&uo=4&at=10l6SU