With kind thanks to the awesome Nim Ralph who started this list.

Science

NASA has made their entire media library public:
https://www.diyphotography.net/nasa-makes-entire-media-library-publicly-accessible-copyright-free/

Read and/or be part of global people powered research projects:
https://www.zooniverse.org/projects

Arts and culture

MOOG and KORG are offering free access to their synth apps (the Kaossilator is awesome) free on iphone and android:
https://www.theverge.com/2020/3/16/21181915/synth-apps-free-moog-korg-kaossilator-minimoog-model-d-coronavirus

Explore a new aspect of art each day: https://www.explorationoftheday.com/

Downloadable colouring books from 113 different museums!
http://www.openculture.com/2018/02/download-free-coloring-books-from-great-libraries-museums-cultural-institutions.html

Stay at Home Fest: An online music festival! (crowdsourcing all the online gigs people are putting on):
https://www.stayathomefest.com/

Live Stream Directory: Another calendar of lots of free live streams including the Met Opera:
https://www.socialdistancingfestival.com/live-streams

Free online concerts:
https://miss604.com/2020/03/free-concerts-to-watch-at-home-during-covid-19-distancing.html

Virtual museum tours:
https://www.travelandleisure.com/attractions/museums-galleries/museums-with-virtual-tours

64 million artists: A 2 week creative challenge to help you at home:
https://64millionartists.com/

Online plays and theatre:
https://www.dramaonlinelibrary.com/

Online gigs (not all free, here to help artists get paid too): https://www.stageit.com/

Free audiobooks:
https://librivox.org/

Over 1500 free online courses, audiobooks and movies:
http://www.openculture.com/2020/03/use-your-time-in-isolation-to-learn-everything-youve-always-wanted-to.html

TV and Movies

Netflix party – interactive way to watch netflix with friends from your own houses:
https://www.netflixparty.com/

1150 free movies:
http://www.openculture.com/freemoviesonline

Gaming

Enigma Emporium: A free downloadable escape room!
https://www.theenigmaemporium.com/playfree

Free online LARP e.g. Dungeons and Dragons — you can be a total beginner:
https://roll20.net/

Parenting

A big resource list for the lockdown:
https://thegreenparent.co.uk/articles/read/lockdown-life-savers

National Geographic for Kids:
https://www.natgeokids.com/uk/

A HUGGGEEEE List of educational resources:
http://www.amazingeducationalresources.com/

Online Learning

https://www.coursera.org/

Not free, but heavily discounted: https://www.udemy.com/

MIT open courses: https://ocw.mit.edu/index.htm

Free computer programming skills: https://blockly.games

Faith and religion

A lot of resources e.g. learning, science, music etc but with a full list of prayer support at the end:
https://chatterpack.net/blogs/blog/list-of-online-resources-for-anyone-who-is-isolated-at-home

Mental health help services

Telephone befriending service for the elderly: https://www.thesilverline.org.uk/

Online cognitive behavioural therapy site:
www.llttf.com

Free emotional support from trained listeners; online counselling:
https://www.7cups.com/

Children and adolescent mental health support resource: www.youngminds.org.uk

Meditation/ relaxation and sleep resources: https://www.headspace.com

Wellbeing advice:
https://www.mind.org.uk/workplace/mental-health-at-work/taking-care-of-yourself/five-ways-to-wellbeing/

Bereavement counselling:
https://www.cruse.org.uk

Samaritans:
https://www.samaritans.org/

Papyrus HOPElineUK:
Confidential support line for any under 35s at risk of suicide or anybody worried about a young person at risk
10am-10pm Mon-Fri, Weekends 2pm-10pm
0800 068 4141 / 07786209697

CALM helpline: Confidential Emotional Support for Men
Mon-Fri 1pm-11pm
0800585858
www.thecalmzone.net

Switchboard LGBTQ+ helpline: Confidential support from LGBTQ+ volunteers
10am-10pm every day
0300 330 0630

Self help resources for mental health issues: https://www.cci.health.wa.gov.au/res…/looking-after-yourself

Online resource for all mental health issues, including bereavement: https://www.moodjuice.scot.nhs.uk