Below is a list of resources I have either created or found useful:

Let’s Not Sing Tipperary

Published in 2016 this site currently has over 16,000 users and is part of the A Choir In Every Carehome project run by Live Music Now, Sound Sense, and the Sidney De Haan Research Centre. It provides a “pick n mix” selection of tried and tested dementia friendly repertoire for vocal sessions.
http://www.letsnotssingtipperary.co.uk

V-Downloader

A free app that allows you to download video clips from youtube, categorise them in folders and then play back without internet access. Perfect for music quizzes, references and bespoke background.
https://itunes.apple.com/us/genre/ios/id36?mt=8