A few of us are trying to get development moving again on Sandstorm.io. It's a super handy (and default-extremely-secure) piece of software, it just needs a little nudge of developer interest. It's original target was the enterprise space, but it's an awesome self-hosting platform for privacy nerds too.

The OSS is out there, but you've gotta wrap it in enough design work to make the experience comparable to closed source offerings: Most businesses aren't going to want to pay for worse software.