This list is by no means exhaustive and ever-expanding (NOTE: please reach out via social channels or discord if you have any more to offer!)
UK
CALM (Campaign Against Living Miserably) – CALM offers a free confidential helpline and webchat for anyone who needs to talk. They spread awareness of mental health (especially in men, who are more likely to complete suicide) and offer bereavement support via Support After Suicide Partnership
Mentell – Mentell provides free circles (local and online) for men ages 18 and over to talk – or just listen – in a safe and confidential space.
MIND.org.uk – Whether you need urgent help or resources to support yourself with coping mechanisms, MIND is a UK based charity that provide advice and support for anyone experiencing a mental health problem.
Papyrus UK – Papyrus aims to prevent young suicide by supporting young people who are struggling with suicidal thoughts and equipping communities with preventative skills.
YoungMinds.org – Young Minds campaigns to support young people from reaching crisis point with their mental health through education and preventative support.