Spotted these recently and thought they looked good:
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AirGradient – “We design professional, accurate and long-lasting air quality monitors that are open-source and open-hardware so that you have full control on how you want to use the monitor.”
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Meshtastic – long-range, low-power, low-bandwidth, off-grid, decentralised mesh networks, based on LoRa radios.
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Plausible – an alternative to Google Analytics – “Plausible is intuitive, lightweight and open source web analytics. No cookies and fully compliant with GDPR, CCPA and PECR. Made and hosted in the EU, powered by European-owned cloud infrastructure”
Quentin. Thanks for mentioning our company! We actually try and go way beyond just being open source hardware. Have a look for example at:
https://www.airgradient.com/manifesto/
Or our super bold Terms and Conditions:
https://www.airgradient.com/terms-conditions/