It depends.
Windows: Definitely NVDA (github.com/nvaccess/nvda) Linux: AT-SPI, ATK, Orca for the graphical side of things. The console/terminal is pretty well supported.
Windows: Definitely NVDA (github.com/nvaccess/nvda) Linux: AT-SPI, ATK, Orca for the graphical side of things. The console/terminal is pretty well supported.