Here is a growing list of apps and sites I use.
Website: http://www.lessonpaths.com/
Google Chrome app: https://chrome.google.com/webstore/detail/lessonpaths/mabefejikongohcoocpjblkjmghkpelh
Website: http://www.claco.com/
Website: http://www.schooltube.com/
Edmodo app: http://www.edmodo.com/publisher/schooltube
Website: http://teachertube.com/
Website: http://makezine.com/
Website: https://educlipper.net/
Free iPhone app: https://itunes.apple.com/us/app/educlipper/id737584066?mt=8&uo=6&at=10l6SU
Free iPad app: https://itunes.apple.com/us/app/educlipper/id737584066?mt=8&uo=6&at=10l6SU
Website: http://betterlesson.com/
Free Mac program: http://itunes.apple.com/us/app/ibooks-author/id490152466?mt=12&uo=4&at=10l6SU
Free Mac program: http://sketchup.google.com/
Free Windows program: http://sketchup.google.com/
Website: http://vimeo.com/
Free iPad app: https://itunes.apple.com/us/app/pearltrees/id463462134?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/pearltrees/id463462134?mt=8&uo=4&at=10l6SU
Website: http://www.pearltrees.com/
Google Chrome app: https://chrome.google.com/webstore/detail/pearltrees/hjcccdngnaailhnoflbeficiokgcfaah
Free Android Phone app: https://play.google.com/store/apps/details?id=com.zite
Free iPad app: http://itunes.apple.com/us/app/zite/id419752338?mt=8&ls=1&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/zite/id419752338?mt=8&ls=1&uo=4&at=10l6SU
Website: https://www.google.com/apps/edu/
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/
Website: http://www.livebinders.com/
Website: http://www.nearpod.com/web
Free iPad app: http://itunes.apple.com/us/app/nearpod/id523540409?ls=1&mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/nearpod/id523540409?ls=1&mt=8&uo=4&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.panareadigital.Nearpod
Website: http://www.flickr.com/
Website: http://www.teachertime.com.au/
Website: https://www.thoughtbox.es/
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
Free iPad app: http://itunes.apple.com/us/app/visualize-free/id456857776?mt=8&uo=4&at=10l6SU
Paid iPad app: http://itunes.apple.com/us/app/visualize/id444076754?mt=8&uo=4&at=10l6SU
Free Mac program: http://www.alice.org/
Free Windows program: http://www.alice.org/
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://mapstory.org/
Website: http://learni.st/
Free iPad app: https://itunes.apple.com/us/app/learnist/id522850398?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/learnist/id522850398?mt=8&uo=4&at=10l6SU
Website: http://learnzillion.com/
Website: http://www.beasmartercookie.com/
Free iPad app: https://itunes.apple.com/us/app/smartercookie-uploader/id663608148?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/smartercookie-uploader/id663608148?mt=8&at=10l6SU
Free iPad app: http://itunes.apple.com/app/studyroom-learn-together/id559556794?mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/app/studyroom-learn-together/id559556794?mt=8&uo=4&at=10l6SU
Website: http://www.getstudyroom.com/
Website: http://busyteacher.org/
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/
Website: http://www.school-pages.com/
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
Website: https://thimble.webmaker.org/
Paid iPhone app: https://itunes.apple.com/us/app/storyrobe/id337670615?mt=8&uo=4&at=10l6SU
Website: http://www.flubaroo.com/
Website: https://www.teachingchannel.org/
Website: http://www.symbaloo.com/
Free Android Phone app: https://play.google.com/store/apps/details?id=com.symbaloo.android
Free iPhone app: https://itunes.apple.com/us/app/symbaloo-bookmark-share-your/id521081559?mt=8&uo=4&at=10l6SU
Google Chrome app: https://chrome.google.com/webstore/detail/symbaloo/dfnbdccaiknlpdgabdgjijniolkgmoeh
Free Mac program: http://www.techsmith.com/download/jing/default.asp
Free Windows program: http://www.techsmith.com/download/jing/default.asp
Website: http://suseit.stanford.edu/research/project/smile
Website: http://www.slideshare.net/
Free iPad app: https://itunes.apple.com/us/app/educreations-interactive-whiteboard/id478617061?mt=8&at=10l6SU
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
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://docs.google.com/
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
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
Website: http://sites.google.com/
Website: https://popcorn.webmaker.org/
Website: http://www.myclassroomideas.com/
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
Website: http://curriki.org/
Website: http://lessonopoly.org/
Free Mac program: http://scratch.mit.edu/download
Free Windows program: http://scratch.mit.edu/download
Website: http://eduify.com/
Website: http://www.quia.com/web
Website: http://edufire.com/
Website: http://www.mangahigh.com/
Website: http://classcharts.com/
Google Chrome app: https://chrome.google.com/webstore/detail/class-charts/pjmmpemannlahkbibemdmhglliakbkbl
Free Mac program: http://audacity.sourceforge.net/download/
Free Windows program: http://audacity.sourceforge.net/download/
Paid iPad app: http://itunes.apple.com/us/app/vocab-a-splat/id517271626?ls=1&mt=8&uo=4&at=10l6SU
Website: http://kidblog.org/
Free iPad app: http://itunes.apple.com/app/tinkerbox-hd/id415722219?mt=8&uo=4&at=10l6SU
Website: http://www.xtranormal.com/
Paid iPad app: http://itunes.apple.com/us/app/blogsy/id428485324?mt=8&ls=1&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/scoop.it/id487321972?mt=8&uo=4&at=10l6SU
Website: http://www.scoop.it/
Website: http://www.bloomboard.com/
Website: http://www.sophia.org/
Website: https://www.boundless.com/
Free iPad app: https://itunes.apple.com/us/app/boundless-textbooks/id661340407?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/boundless-textbooks/id661340407?mt=8&uo=4&at=10l6SU
Website: http://cubertscube.com/
Website: http://www.sidevibe.com/
Paid iPad app: https://itunes.apple.com/app/timeline-maker/id527025710?mt=8&uo=4&at=10l6SU
Website: http://skoolbo.com/
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: https://grockit.com/answers
Website: http://www.powtoon.com/
Google Chrome app: https://chrome.google.com/webstore/detail/powtoon-edu/ogodblbnhpbcmcjcoopbalconhnloagl
Website: http://www.planboardapp.com/
Website: http://www.pbs.org/teachers
Free iPad app: https://itunes.apple.com/us/app/watchknow-educational-videos/id423622049?mt=8&uo=4&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/watchknow-educational-videos/id423622049?mt=8&uo=4&at=10l6SU
Website: http://www.watchknowlearn.org/
Free iPad app: http://itunes.apple.com/us/app/itunes-u/id490217893?ls=1&mt=8&uo=4&at=10l6SU
Free iPhone app: http://itunes.apple.com/us/app/itunes-u/id490217893?ls=1&mt=8&uo=4&at=10l6SU
Website: https://www.turnitin.com/
Edmodo app: http://www.edmodo.com/publisher/turnitin1
Website: http://www.minecraft.net/
Paid Mac program: https://minecraft.net/download
Paid Windows program: https://minecraft.net/download
Free Android Phone app: https://play.google.com/store/apps/details?id=de.rakuun.MyClassSchedule.free
Paid Android Phone app: https://play.google.com/store/apps/details?id=de.rakuun.MyClassSchedule.paid
Website: https://t.myhomeworkapp.com/
Free iPad app: https://itunes.apple.com/us/app/id303490844?mt=8&at=10l6SU
Free iPhone app: https://itunes.apple.com/us/app/id303490844?mt=8&at=10l6SU
Free Android Phone app: https://play.google.com/store/apps/details?id=com.myhomeowork
Free Android Tablet app: https://play.google.com/store/apps/details?id=com.myhomeowork
Free Mac program: https://itunes.apple.com/us/app/myhomework-student-planner/id970610831?mt=12&at=10l6SU
Google Chrome app: https://chrome.google.com/webstore/detail/myhomework/pembccdigcahnckbjcbehhcacplbbomj