Lotus QuickPlace is a self-service web tool for team
collaboration, providing
shared team
workspace. Easy management of users directly or based on NT Domain, or
LDAP. It includes provision of
rooms within the
QuickPlace for secured areas for subsets of users.
Email notifications of pages
published after check out for editing is also supported.
Available free for 45 days trial period, also per user licensing cost is reasonable.
more at
http://www.quickplace.com/
http://www.lotus.com/quickplace/