DisMoi (France)

Dismoi is a web extension that allows anyone to post information directly on any web page you browse. If you follow an informer, his messages are displayed at the time you visit the pages he has commented on. DisMoi’s ambition was to become a platform using contextual signals (visited web page, geographical position, product barcode...) to provide relevant information. Dismoi is open-source, ad free, and does not collect any personal data. The project was discontinued. Source code and contributions are open source : https://github.com/dis-moi