I replaced Windows 11’s default apps with these open-source tools

Discover five lesser-known open-source apps that significantly improve the clipboard, files, apps, sharing, and media playback on Windows 11.
ZDNet

I found an open-source NotebookLM alternative that's powerful, private - and free

Open Notebook is an open-source take on NotebookLM. Open Notebook can be installed and used for free. You do have to understand Linux and containers to deploy it ...