Since Microchip acquired HI-TECH, the standalone installer is no longer on the main front page. You can typically find it in:
The compiler generates:
: Because it is a legacy product, Microchip typically recommends using the XC8 compiler , which includes a "HI-TECH compatibility mode." Updated Versions hitech+c+compiler+for+pic10+12+16+mcus+v983+download+updated