I mounted Google Drive, OneDrive, and Dropbox as one folder on my PC with a single free tool

I had Google Drive, OneDrive, and Dropbox all installed on my PC at the same time, and it was a mess. Each service came with its own client hogging RAM in the background, its own notification icon, and its own quirky way of handling sync conflicts. As you can probably guess, this made managing files across cloud providers a nightmare.