When my work projects were interrupted because of COVID, I was able to advance a side project, Factonaut, into a "minimum viable product" (or at least into one that I no longer have to be ashamed of when releasing it). I continuie to improve it, but only slowly as my work projects returned to previous levels.

Factonaut is a computer programme for Windows 10 that allows you to compile historical events in a knowledgebase and easily create chronological overviews. Product link: https://www.factonaut.com/