Probably the largest collection of HEMA resources is Wiktenauer where you can find a vast majority of the manuscripts and technics, with original texts and translation. However, there are not that many you can download, if you want, like me, to be able to print them.
Therefore I have tried to compile a library of downloadable manuscripts that is available online.
Svenska HEMA förbundet – manuscripts translated to Swedish
Clas Adam Ehrengranat – Ridskolan eller Ridläran -1836 (Swedish)