Highly useful to be able to have access groups like "team" (everyone, things like Zendesk) "team-secure" (stuff with CC's, like Amazon), "dev" (general dev accounts), and "dev-secure" (compose.io access and the like).
Makes it way faster to onboard new folks, and when people leave, to cleanly strip access and change passwords.
The open source tools don't solve for those kinds of use cases, as far as I know. Just "I have one computer, and want to store my passwords on that one computer."
The server and the chrome/firefox extensions that are opensource (https://github.com/WeAreWizards/passopolis-server, https://github.com/WeAreWizards/passopolis-extensions).
Right now it's mostly for us and other mitro escapees to continue using it so we didn't bother with the site design or the mobile apps. The exact feature you mention would be the first one to be done if we decide to monetize it though ! It would say opensource as well.
I've yet to find any open source software that does team management. Even multiple open source tools that work together to create this functionality would be great.
Also, no way I would do anything important on my phone. These things seem to be about as secure as sieves.
For me, I use a plaintext file in a Truecrypt archive because I'm a massive dweeb.
http://www.zdnet.com/article/truecrypt-critical-flaws-reveal...