Great rom site which I personally use to get N64 roms. You can get every n64 rom you ever will need in here. No pop-ups or voting. Only an occasional ad when you click on a link but that isn't such a big problem. If you download for example, a zelda: majora's mask, you will get all it's versions. The files are in 7z format and can be extracted with WinRAR.
http://romhustler.net/