The mission of the Open Source Applications Foundation (OSAF) was..
Carry forward the vision of Vannevar Bush, Doug Engelbart, and Ted Nelson of the computer as a medium for communication, collaboration, and coordination.
Design a new application to manage personal information including notes, mail, tasks, appointments and events, contacts, documents and other personal resources.
Enable sharing with colleagues, friends and family. In particular, meet the unique and under-served needs of small group collaboration.
Lotus Agenda for DOS is unmatched to this day, despite an epic reboot catastrophe, https://en.wikipedia.org/wiki/Open_Source_Applications_Found...
EccoPro (successor to Agenda) for Windows works on Apple Silicon Macs via Wine/Crossover, https://en.wikipedia.org/wiki/Ecco_Pro & https://groups.io/g/EccoPro