Bensound.com - nearly all creative commons licensed instrumental jingles
Creative Commons - contains a list of other sites and sources for creative commons music.
Sound Cloud
https://search.creativecommons.org
Jamendo https://www.jamendo.com/?language=en
FreePlay
LearnOutLoud.com - free downloads of audio indexed by subject
Soundzabounds- free music
YouTube Audio Library
Creative Commons https://creativecommons.org/
Insert Image feature in 365 - choose Creative Commons
Pixabay https://pixabay.com/
Pexels https://www.pexels.com/
Adobe Spark https://spark.adobe.com/ex/edu/
Canva https://www.canva.com/
Animoto
Thinglink
Museum Box
Storybird
Stupeflix
Adobe Slate
Smore
Glogster
Book Creator
ChatterPix
Wevideo
Aurasma
Powtoon
Go Animate
Animaker
Wideo
Moovly
Vyond
Doodle Marker
Jamboard (Google)
Padlet
Pinside
Scrabblr
Linoit
Word Cloud
PowerPoint
Google Slides
Animoto https://animoto.com/
iMovie https://www.apple.com/imovie/
WeVideo https://www.wevideo.com/
KineMaster https://www.kinemaster.com/
VSDC Video Editor http://www.videosoftdev.com/
SWAY https://sway.office.com/howtosway
Video Editor in Microsoft
Final Cut https://www.apple.com/final-cut-pro/
InShot https://apps.apple.com/us/app/inshot-video-editor/id997362197