Everything (Puter)
Puter's MIT-licensed monorepo of 50+ open-source web apps rebuilding Excel, Slack, Photoshop, AutoCAD, Salesforce and more, most with a live demo you can try in the browser.
DevelopmentProductivity
Open Source sites
2 sites
HowToLiveBetter
A free, open Chinese guide of 765 evidence-graded life tips on health, first aid, money, law, jobs, social insurance and family, each citing papers or official sources.
Learning