ISO has released a series of health and medical device related standards for free, read-only access. The list includes ISO 13485, the medical device manufacturers quality system standard.
The full list can be found here.
The standards still must be purchased for PDF format, offline reading, but the entire standards are reproduced as text on the associated pages. These can then be saved or printed to PDF from a web browser.
It’s not clear how long ISO intends to keep these standards available in this manner.