Sitix is written in C++ without any frameworks or anything. It doesn't muck about with Node.JS or Ruby or any such stuff. This means native-level performance, but requires compilation and testing on many platforms. It's guaranteed to work on Fedora Linux and probably works in most other Linuxes; MacOS is a possibility. Windows, being too stone-age for POSIX, probably won't be able to run Sitix.

At the moment, Sitix has no prebuilt binaries; I hope to include RPM/DEB packages in the next release.
To install it, you'll need to clone the Github repository, create a build directory for CMake, run cmake .. inside that new build directory, cmake --build ., and (assuming the build completes successfully: if it doesn't, submit an issue!) copy the generated sitix binary to some PATH-accessible location (/usr/bin is a good bet). Sitix requires a C++20-compatible G++ (usually included with the gcc package); it has no other dependencies. Sitix is theoretically cross-compilable to Windows, but I have no intention of ever officially supporting it; Microsoft doesn't deserve it.

Once you've got Sitix installed, see Usage.