# Friend projects _Image Credit: Laboratorio Ciudadano de Salud Urbana_ Below there's a list of similar projects in either philosophy, sensors and ideas: - [Lichen Social Innovation](https://lichensi.com) - [Ideas4Change](https://www.ideasforchange.com/) - [Laboratorio Ciudanano de Salud Urbana](https://www.labcsu.com/) - [ISGLOBAL](https://isglobal.com) - [Aire Ciudadano](https://aireciudadano.com/) - [Luftdaten - now sensor.community](https://sensor.community/en/) - [Purpleair](https://www2.purpleair.com/) - [hackAIR](https://www.hackair.eu/) !!! info "School project in Barcelona?" You can have a look [here](https://agora.xtec.cat/cesire/cesire/servei-de-prestec-i-cambra-de-cria/sensors-i-consoles/) to borrow sensors and SCKs for a period of time with pedagogical guide included.