This website hosts two different spreadsheets for Super Mario 64 romhacks. One with downloads for patch files, another with information on most romhacks. If you cannot find a hack or make a new hack you can submit it on the submit a hack section. Below is a video on how to apply patches. You can also apply patches using the online web patcher on the Apply Patches page. Just follow the onscreen instructions and you will be able to patch new romhacks.

You can find a list of all the hacks in this download on the page titled Patch Downloads

You can also download a .7z file containing all the patches compiled by TomatoBird8 with this link: Giga Patch Downloads (Last updated: 03/09/2019 (dd/mm/yyyy)) Make sure to extract into a folder with a path short enough for some of the long file names in the pack. (for example: C:\Patches\)

You will need 7-zip or WinRAR to open the compressed folder. You can find both of the software in the links below OR from your app store on mobile.