Another open/DIY mouse project is the Ploopy ecosystem, discussed here several times: https://ploopy.co/ https://ploopy.co/ https://news.ycombinator.com/item?

Another open/DIY mouse project is the Ploopy ecosystem, discussed here several times: https://ploopy.co/ https://ploopy.co/ https://news.ycombinator.com/item?id=31777326 https://news.ycombinator.com/item?id=31777326 https://news.ycombinator.com/item?id=28285427 https://news.ycombinator.com/item?id=28285427 https://news.ycombinator.com/item?id=21263264 https://news.ycombinator.com/item?id=21263264 They focus on trackballs and the 3D printed construction. I appreciate the pragmatic approach here of buying a cheap injection-molded mouse and focusing on the PCB and firmware in this project!