Affordable glasses
Onedollarglasses offers a solution for deprived people to enable clear sight: The glasses cost 1 US$ (material costs) and are manufactured locally without requiring electricity: https://www.eindollarbrille.de/en/home
Mental health support
The friendship bench in Zimbabwe is an organisation providing mental health support through community workers offered on public benches: https://www.friendshipbenchzimbabwe.org
Commonground in Michigan, USA, offers support in mental health emergencies with a variety of services: https://commongroundhelps.org
Sati App provides psychological first aid through connecting listeners and people in need, i.e. in Thailand: https://www.satiapp.co
Also look at "war" on the left.
Healthcare community service
Grameen America, a microloan organisation in the US, offers a programme to women with health workers delivering basic services (testing blood pressure, dental screening, cancer consultation...) and conducting workshops. https://www.grameenamerica.org/communityhealthinitiative
Sexual Violence The "house of woman" approach offers help to women. The idea is to offer different kinds of support (medical, legal, psychological,...) in one centre so it creates an infrastructure for traumatized victimes (over 30 centres in France and Belgium): https://www.lamaisondesfemmes.fr
The German "way home telephone" offers to people on their way home (from a restaurant or a bar) to call them when anxious to be accompanied throughout the call until they reach their house: https://heimwegtelefon.net
Detecting Tuberculosis
Apopo in Belgium trains rats to detect Tuberculosis in samples provided by clinics (i.e. in Tanzania): https://apopo.org
First aid support in terms of heart attacks
Germany based "mobile Retter" (mobile saviours) has developed a system supported by smart phones, through which people calling emergency also activate a first aid person nearby so that they can be treated earlier: https://www.mobile-retter.org
Heat management
Cool places: A German database links to city websites showing interactive maps. These maps, which are filled by hints of citizens, mark shadow places, public buildings or parks: https://kühle-orte.de
German city Bielefeld offers a "heat portal" including a telephone service, behavioral tips (i.e. for the elderly), when it is very hot and a service called "heat assistants", where especially trained volunteers support people in need in terms of home help: https://www.bielefeld.de/hitzeportal
(If you click the wheel on the website and then the last item, it is translated.)
Also look at "cities" for environmental planning, and at "age" and "poverty" on the left.