WBO is an online realtime collaborative whiteboard. You just open the website, start drawing, sketching, mindmapping, and your updates are shared with your coworkers instantaneously. It is open-source and easy to deploy on your own server.
Sanipasse is a reader for the french test and vaccination certificates.
As an organizer, you can invite people to your event and let Sanipasse check that everyone is either vaccinated or tested negative before they can attend.
SQLPage is a lightweight SQL-only webapp builder, allowing engineers and data analysts to build dynamic websites quickly. Other platforms try to lock you in; SQLPage is opensource and makes it trivial to switch to something else when your application grows.
