I've trained in HEMA, in the German Kunst des Fechtens tradition for about 3 years (this past year, not much). Wiktenaur is my primary resource for sources. It's a brilliant website. They've also published a 3-part side-by-side compilation of the major Liechtenauer treatises which I use regularly, and I believe an updated 5-part compilation is in the works.

I was pleasantly surprised to see this link up on HN.