[lisper]

https://sc4.us/hsm

It's fully open-source, but the only standard application currently supported is U2F.

Disclosure: this is my product.

[chaz6]

FYI your website is blocked by my work proxy:-

Access Denied (content_filter_denied)

Your request was denied because of its content categorization: "Placeholders"

[lisper]

Very sorry about that, but I have no idea what I can do about it. The page is not a placeholder. It's a very generic Bootstrap page with real content.