We are looking at lastPass - looks good so far. (enterprise Ed)
IronStratus is another one to check out lets users keep their own personal passwords and grant access to apps passwords by an admin.
I personally prefer 1password - but it's really single user oriented.
Obviously different from I'd/auth providers like okta or ping identity...but i find there are so many accounts/passwords shared in organizations for services that these guys may not support. (apps with no SSO services for example). Yes, they have some password management tools but they don't seem to have in app/browser shortcuts (ie:chrome/ff extensions).
Keepass is a decent option for a smaller company (http://keepass.info/). It's a bit limited in a sense that it doesn't support multiple users that can view different password tiers, but it does an ok job at syncing changes by multiple users. I am sure there are plenty of decent commercial options.
I've seen some companies hack a homemade solution based on Truecrypt as well, though it's probably not very efficient.
We also use KeePass (Classic Edition) saved in a repository that we can then share. The nice thing about KeePass is that there are clients/ports/compatible programs on Windows, linux, iDevices, and Android.
The repository gives us versioning and a relatively crude but effective way of sharing as well as some additional access control.