Rui Carmo
The tool itself is interesting enough, but the rationale for it and the write-up of how it operates (spoiler: it mimics the side-swipes on trackpads) are well worth reading.
As a side comment, it’s interesting to realize that I’m back using an external trackpad on my desktop after parking my Windows machines for a few weeks. I’m curious to see whether I’ll go back to a mouse after returning to work…