Windrecorder is a memory search app by records everything on your screen in small size, to let you rewind what you have seen, query through OCR text or image description, and get activity statistics:
https://github.com/yuka-friends/Windrecorder
Memento is a Python app that records everything you do on your computer and lets you go back in time, search, and chat with a LLM to find back information about what you did:
https://github.com/apirrone/Memento