If you are looking for free downloads, consider these legitimate sources:
Note: This is a draft template. If you intended to actually a download link for a free RTGI shader, please note that the draft above strongly advises against using untrusted "free" sites. For legitimate free shaders, search for "SSRTGI GitHub" (open source) or check the ReShade Forum for free presets.
If you are looking for free downloads, consider these options that provide similar ray tracing-like enhancements without a paywall: